Questions? We're open! Call us! 888-488-1468
Questions? We're open! Call us! 888-488-1468

Any Size. Any Shape.


Aire-flow™ is designed to prevent moisture build-up underneath mattresses, bunk pads, and cushions. Note: Sold by the Linear Foot Learn more

4.74 (82 Reviews)
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Hypervent Aire-Flow™ Mattress Underlay for Mattresses & Cushions

Free FedEX Shipping!
Size/Shape Can Be Customized Upon Request

Are you looking for a solution to mold, mildew, dampness, or moisture build up under your boat mattress, RV mattress, bunk pads, or cushions?

The most practical and affordable solution is the Hypervent Aire-Flow™ Mattress Underlay.  Simply place the material underneath your mattress or cushions to minimize moisture buildup.

What’s causing this problem in the first place?

Mattresses in Boats, RVs, Trucks, and Aircraft usually rest on plywood or other types of flat hard surfaces.  Most of those surfaces provide minimal air circulation underneath your bed.

When you’re sleeping, your body heat increases the temperature of the mattress.  Some of that heat radiates out of the top and sides of the mattress, but a lot of it radiates out of the bottom.

If the surface the mattress is lying on is colder than the mattress itself (it usually is), that temperature difference can cause condensation to form.  And if the condensation can’t evaporate, it can lead to mold or mildew buildup.

How does Hypervent Aire-Flowresolve my issue?

Hypervent Aire-Flow™ provides unobstructed airflow by elevating the mattress off the sleeping surface…kind of a like a magician’s assistant in a Vegas magic show. 🙂

When the mattress is elevated, warm air is able to circulate under the mattress which minimizes conditions necessary for condensation.

If condensation does occur, the Hypervent Aire-Flow™ material allows that moisture to evaporate.

What is Hypervent Aire-Flow?

It’s a 3/4″ industrial-grade woven polymer material bonded to a breathable fabric.  The material was originally designed for water drainage in parking structures and soccer fields.


  • Allows for unobstructed airflow under your mattress
  • Light weight material weighing only 4.3 oz per sq yard
  • Easily bends around door ways and tight spaces
  • Maintenance free
  • Unaffected by cold temperatures
  • Very strong but flexible (can support very heavy people)
  • Holds it’s shape indefinitely and outlasts your mattress
  • Can’t be felt underneath your mattress
  • Easy to clean and dry (soaps, hot water, or steam cleaning is ok)
  • Easy to join multiple pieces together.  Simply apply adhesive or tape to a 3″ overhanging flap.
  • Easy to cut with a pair of scissors


Hypervent Aire-Flow™ is available in widths of 39″ and lengths of up to 50 feet.

Mattress Size Moisture Barrier Needed (in linear feet)
76″ x 80″ – King 13 ft*
72″ x 80″ – RV King 12 ft*
72″ x 75″ – Short King 12 ft
66″ x 80″ – Olympic Queen 11 ft*
60″ x 80″ – Queen 10 ft*
60″ x 75″ – Short Queen 10 ft
54″ x 75″ – Full 9 ft
54″ x 80″ – Full XL 9 ft*
48″ x 75″ – Three Quarter 8 ft
39″ x 75″ – Twin 7 ft

*This amount will leave 1 inch on each side not covered by the moisture barrier. For example – we recommend 10 linear feet for a 60″ x 80″ mattress. However, since the moisture barrier is 39 inches wide, ordering 10 linear feet will mean you will have enough to cover a 60″ x 78″ space. Our customers don’t notice this in terms of feel, and you will still get excellent air flow to help prevent condensation.

How do I order?

Choose the number of linear feet you’d like from the drop down menu and click “add to cart”.  If you’re not sure how much you need, give us a call and we can help!

Please note – due to the custom nature of this product, we do not accept returns once an order has been shipped.

Custom Sizes & Shapes

Need us to cut it to fit your mattress for you or are you unsure of how much length you need?  Give us a call 888-488-1468

Shipping and handling time

As soon as the Hypervent leaves our warehouse, we will email you the FedEx tracking number. Hypervent generally deliver within 7-12 business days from the time of order. Unless requested, FedEx will not require signature upon delivery. Please allow extra days around the holidays or for remote areas. For details, contact us at 888-488-1468.

The Hypervent Aire-Flow™ material will be cut to your desired length, and we’ll roll it up and put it in a shipping box.  When it arrives, it looks like rolled up carpet.

Shipping and handling time

This will ship from our plant in SC.  Allow 4-7 business days before shipping.

The Hypervent Aire-Flow™ material will be cut to your desired length, and we’ll roll it up and put it in a shipping box.  When it arrives, it looks like rolled up carpet.

Non-Contiguous States & Canada Shipping: If shipping to Alaska, Hawaii, US Territories, or Canada, please call for shipping costs. Remote areas may be assessed higher shipping fees. The customer is responsible for all customs fees when shipping to Canada.

Other applications besides boats and RVs:

  • Aircraft
  • Truck campers
  • Semi trucks
  • motorhomes
  • Travel Trailers or Fifth Wheels
  • Pop-up Campers
  • Sleeper Sofas (can’t be folded into couch)
  • Homes or mobile homes
  • Apartments
  • Pet beds
  • Dock lockers, boxes, sail and rope lockers, drawers, ice boxes, refrigerators
  • Cans or metal containers to prevent rust
  • Near bilge pump intakes in order to reduce the possibility of clogging.

4.7 / 5.0
82 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Moisture barrier works
This product is amazing!!! We had used it before on our trawler under the mattresses, sofas, it works to keep everything dry and mold free. We now have put it in our RV under the beds and sofas……. we live in FL and lots of humidity…… we NEED this product!!! You wont be disappointed !!!
May 22, 2017
over 3 years ago
Rated 5 out of 5
Wonderful product
I use this under my dog's mattress in his kennel, as well as beneath one of my memory foam mattresses that is supported by a sheet of plywood instead of the typical slats that support a mattress. The ability for air to flow beneath memory foam is important, particularly the dog bed. The aire-flow moisture barrier hasn't just prevented moisture from forming beneath the mattress, but has prevented unpleasant aromas from forming in the kennel as well.
May 22, 2017
over 3 years ago
Rated 4 out of 5
Solved a thorny problem
We had some moisture and minor mold problems with the previous foam mattress in our RV. We found the replacement mattress we wanted but wanted to make sure we didn't have the same problems again. Aire-Flow saved me from having to do extensive modifications to our bed platform and/or design and build a slat system. The only reason I didn't give the product a fifth star is the price… a bit costly in my opinion.
November 8, 2017
over 3 years ago
Rated 5 out of 5
We have had moisture issues with our mattresses in our Airstream and even mold even while the coach was heated. Aire-flow has completely eliminated this problem and I ordered another piece to insert behind our couch which touches the outside wall and creates moisture. I’m confident I won’t have that problem any longer there either. Excellent product.
December 4, 2017
over 3 years ago
Rated 5 out of 5
Excellent service!
Really impressed with the customer service so far with Mattress Insider. They were able to cut the material to the exact shape of the sleeping area in my boat. Can't wait to receive it!
February 1, 2017
Rated 5 out of 5
Love the product, helped a lot with the moisture. Also added a little bit of cushion. Fast Shipping!!!!
October 16, 2017
over 3 years ago
Rated 4 out of 5
used in RV
I purchased this to use in our airstream between the mattress and the wood platform it lays on to reduce moisture. The material is of good quality for this purpose and it seem like it will do a good job. So far it is working fine but havent had it installed long enough to really tell. It was received quick and packaged nicely.
May 3, 2017
over 3 years ago
Rated 4 out of 5
Has solved our condensation issues in our RV. The mesh is much more ridged than we expected, so it adds plenty of loft under the mattress, but remains able to be cut with scissors.
November 27, 2017
over 3 years ago
Rated 5 out of 5
Works great!
We used to have terrible moisture problems under the mattress on the boat. We tried insulation board and that did very little to help. We then heard about this air flow and it’s works fantastic! No more mildew or mold under the mattress!
October 6, 2018
over 3 years ago
Rated 5 out of 5
A worthwhile investment to prevent a costly problem
The Aire-Fliw moisture barrier arrived on time as promised and the size was as ordered. Installation was easy. There is absolutely no difference in the comfort of our travel trailer bed. It will provide air flow as intended.
May 22, 2017
over 3 years ago

Our product reviews can be found by clicking on the blue “Features” tab above and then scrolling down to the bottom of the product description. In the same area, we’ve also added a Q&A section which gives you the ability to ask product questions. Ask a question and you’ll receive answers from our staff and from past customers who have purchased the product!

Want to check the status of your order? Click on the “Track Order” button at the very top of the page. Alternatively, you can sign in to your account with your username and password to see the order status, obtain a copy of your invoice, or to obtain the tracking number.

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Browse 61 questions Browse 61 questions and 203 answers
Why did you choose this?
Mattress Insider Store
Read some great reviews after some research and chose Mattress Insider because of the free shipping!
Tirzah A on Jan 21, 2021
Heard great things about the product performing well in preventing moisture under the mattress.
Linda T on Jan 10, 2021
Read some great reviews after some research and chose Mattress Insider because of the free shipping!
Tirzah A on Jan 21, 2021
Recommended by Bound for Nowhere
Taylor M on Jan 21, 2021
Heard great things about the product performing well in preventing moisture under the mattress.
Linda T on Jan 10, 2021
Price and reputation
Rodney W on Jan 3, 2021
RV forum recommended this product. Plus I bought my rv mattress from you guys and am very happy with it. Excellent mattress, no chemical smell upon open it. Will definitely buy again.
Kim W on Dec 18, 2020
We have a travel trailer and heard great reviews about mattressinsider and hypervent aire -flow moisture barrier to use under the mattress.
Kelly S on Dec 12, 2020
Recommended and decided to try.
Robert F on Jun 2, 2020
Recommendation from a fellow Airstreamer to use under the mattresses in our Airstream.
Carie M on May 31, 2020
IT seems like a potential solution to the heat build up I am experiencing with my foam mattress on a platform bed.
Andrew T on May 29, 2020
protection for new mattress
gail o on May 29, 2020
I've used it before. I have a sailboat, and I have a large section of Hypervent under my V-berth. I'd like to add more under the quarter berth.
CHRISTOPHER F on May 28, 2020
For a hybrid trailer
Wendy T on May 27, 2020
In an RV, moisture can be retained the bottom of the mattress and the platform it rests on. This promotes airflow underneath the mattress reducing/eliminating moisture.
Janet H on May 26, 2020
excellent reviews, competitive price, free shipping
Horst K on May 24, 2020
Recommendation from a friend and fellow RVer.
Howard L on May 21, 2020
Looking for a good solution for camping in my Jeep Wrangler this summer.
Robert H on May 21, 2020
Wanted to make sure i did not retain any moisture under mattresses in my RV. Time will tell. This is a new purchase that has not been delivered as yet.
Chris4 on May 18, 2020
Light weight solution with a 3/4" thickness, best value in my opinion. good reviews
Timothy S on May 17, 2020
To prevent condensation under our RV mattress, we use hypervent. This is our 2nd RV. Worked well for the first RV.
Lucretia R on May 17, 2020
Highly recommended.
Steven P on May 16, 2020
For a Mattress in an RV
Christina P on May 15, 2020
Belinda P on May 3, 2020
to place under bed mattress in Airstream
boldie24 on May 3, 2020
watched u tube for recommendations for on condensation barrio for our hybrid trailer, heard nothing but good about hypervent
Patricia B on Apr 30, 2020
Online I tried to put the social distance code in and it wouldn’t take it
Thomas S on Apr 27, 2020
maintain airflow for dryness under v-berth mattress
David M on Apr 27, 2020
recommended by another camper
patricia j on Apr 24, 2020
To keep mildew from forming on my mattress which is on plywood.
Annette A on Apr 14, 2020
We are putting it on our boadt
Arleen D on Apr 11, 2020
Seems like the industry standard for managing condensation. After lots of research, all reviews and forum posts point back to Hypervent.
SCOTT G on Apr 11, 2020
I'm convinced it's a "must have" item.
Valerie P on Apr 10, 2020
I've had a problem with mildew in the center of my mattress. I'm counting on this piece to prevent that problem.
Midge B on Apr 7, 2020
internet adds and recommendations after we had built up moisture under our mattress
James L J on Apr 6, 2020
best price with free shipping and best service
James B on Apr 5, 2020
We purchased the moisture barrier to put under our queen sized memory foam mattress. It is on a wooden platform in an RV bedroom. The reviews and price for this product convinced me this is the right material for the job.
George R on Apr 4, 2020
Wife told me to order it for the camper.
brian a on Mar 30, 2020
Prevent moisture build up and odors, etc, that come with moistures build up
NMotter on Mar 29, 2020
Read good reviews from multiple sources.
Kerri H on Mar 29, 2020
Because its a great product.
Joerg M on Mar 26, 2020
We based our decision using the overall good online reviews, and the cost fit into the budget we were looking to spend for this item.
Kevin B on Mar 20, 2020
Looks like a good product for keeping moisture from under the mattress. Was recommended on facebook.
Donnie B on Mar 19, 2020
For mattress in a camper van.
Shane M on Mar 15, 2020
I saw a video on its use
Patrick K on Mar 14, 2020
Based on recommendations from other RV users.
susan h on Mar 14, 2020
Recommended by other rv owners
Katherine B on Mar 14, 2020
got a boat
alex m on Mar 10, 2020
To prevent Mould under trailer mattress. Hope it works!
Deborah P on Mar 10, 2020
Suggested by several rv sites.
Benja W on Mar 10, 2020
good reviews of other RV's in cold weather
Denise K on Mar 9, 2020
recommended by a friend in rv group
samantha b on Mar 7, 2020
Recommended by Bound for Nowhere
Taylor M on Jan 21, 2021
Price and reputation
Rodney W on Jan 3, 2021
Can I trim it to fit?
A shopper on Mar 14, 2017
BEST ANSWER: Hello! I do not see a problem if you were to trim it yourself but why not let us do the work? Simply give us a call with you dimensions and we can process your order with the correct dimensions!
I need 2 beds cut. One is 54×80 and second is 28×75. What would my total cost be ?
Michael on Dec 6, 2017
BEST ANSWER: Hello Michael,
Please give us a call at your convenience (888-488-1468) to discuss your pricing and availability.
Kind Regards!
How many rolls would I need for a queen rv mattress?
Sheila C on Dec 6, 2017
BEST ANSWER: I ordered a single roll 10 feet long by 39 inches wide. I then cut the roll in half to form 2 sections each measuring 60 inches (5 feet) by 39 inches. I joined them to form a pad 78 inches by 60 inches to fit under my 80 inches by 60 inches RV mattress.
Which way is “UP”?
Richle Rich on Jan 6, 2018
BEST ANSWER: Hello! We recommend the fabric side go up against the mattress. Please give us a call if you have any other questions or concerns!
Does it make a crunching sound when you lay on it?
A shopper on Oct 6, 2018
BEST ANSWER: No. I have a very good (thick) memory foam mattress on top of it and the only time I even notice it is when I change the sheets. And even though we’ve had a very moist summer, there is no sign of mold or mildew!
How do I place the order?
A shopper on Jul 28, 2018
BEST ANSWER: Hello! Simply give us a call to place a order!
Does it have an off gassing smell?
A shopper on Feb 19, 2019
BEST ANSWER: The Hypervent Moisture Barrier does not have an off gassing smell. Also, all of our mattress are made in the USA, with USA made components. Nothing is outsourced. Our mattresses do not have an off gas smell, they are Certipurus certified:
The foam used in our mattresses has been tested, analyzed, and certified by the independent laboratory CertiPUR-US®! What does this mean?
CertiPUR-US® certified foams are tested for foam composition and durability. The foam is examined and put through an exhaustive series of tests to ensure it meets strict standards
CertiPUR-US® certified foams are… nontoxic

Low emission (low VOC’s) for indoor air quality (VOC’s are a large component of air pollution)
Manufactured without chlorofluorocarbons (CFCs) or other ozone depleters (commonly found in imported foam)
Made without PBDE flame retardants (PDBE’s have been linked inconclusively to chronic illness in humans and animals)
Made without mercury, lead and heavy metals
Made without formaldehyde (Formaldehyde has been labeled as a cause for poor indoor air quality)
Made without prohibited phthalates
Tested and approved for durability and performance
Virtually Odorless – Our foam is virtually odorless because of the patented Fresh Foam Technology™ used during the manufacturing process.
What about between the mattress and the smooth side of this material? The aire-flow material provides airflow between mattress and floor, but none between the material and the mattress itself… Won’t mildew develop there??
Debi C on Feb 2, 2019
BEST ANSWER: We’ve had ours for 18 months and we haven’t had any issues with mildew or moisture between the material and the mattress. We have had moisture between the plastic part and the bed frame and the barrier has worked as intended, preventing that moisture from reaching our mattress.
How do I cut material?
A shopper on Apr 13, 2018
BEST ANSWER: Hello! We recommend using a utility knife or commercial shears! Please let us know if you need further assistance!
How long does it take to get it?
Janenne P on Oct 13, 2017
BEST ANSWER: I don’t recall exactly how long it took for it to arrive since I purchased it a while ago
but it wasn’t too long–less than 2 weeks for sure.
Aire-flow moisture barrier……..what side goes towards mattress?
Elizabeth B on Dec 21, 2017
BEST ANSWER: Hello Elizabeth,
The “smooth” side of the moisture barrier should be up towards the mattress, while the rough “indoor turf looking” side will be against your base.
Kind Regards!
Will it keep mattress dry if rv is used full time?
A shopper on Jan 17, 2021
BEST ANSWER: We didn’t full time in the RV when we used ours, but it certainly provided for air flow underneath the mattress. The whole idea is to keep the mattress from lying flat on the sub-surface, which this product does well. I’d imagine it would be a great help for a full timer, but you’ll still have to take care to monitor the moisture level inside the RV, especially in winter if you’re in a cold climate.
how long does it last? When will I need to replace it?
A shopper on Nov 15, 2019
BEST ANSWER: 2 years and no sign of wear for me. I’m pretty sure it’s some sort of floor underlayment or stucco rainscreen or something that they’re reselling in smaller pieces under a different name. Designed to be inside walls or floors, so it should last years to decades.
Can I add a reflective layer under Moisture Barrier for add protection?
A shopper on Oct 22, 2019
BEST ANSWER: As long as it does not affect the air flow it shouldn’t be a problem. We recommend checking under the mattress periodically to make sure there is no moisture building up!
how thick is Aire- flow?
e b on Nov 21, 2018
BEST ANSWER: I think it’s about a half inch, although I haven’t measured it.
How do you put it under a mattress that is already there?
Shirley R on Oct 14, 2018
BEST ANSWER: Aire-flow is a layer about 1 inch thick that goes between the bed frame and the mattress. If you cannot separate the mattress from the frame I do not think this will work for you.
How toxic is the material?
A shopper on Jun 8, 2020
BEST ANSWER: Well if it was on fire I doubt that you would want to be breathing the fumes in, but it is a very stable plastic material that we have had in our RV for well over 10 years now without any signs of degradation. I would suggest it is likely to be less toxic than any mattress that you put on top of it.
How do I join two pieces?
A shopper on Sep 19, 2019
BEST ANSWER: They don’t actually join. There is a flap of thin fabric along the edge that overlaps the second piece and sort of holds them in place. They don’t move after the mattress is placed on it. Just place the two pieces close together with the edge of the fabric overlapping.
We are having a problem with tape (duct, vent, etc) not sticking to the fabric of our Aire-Flow sections. What adhesive is advisable?
A shopper on Oct 19, 2018
BEST ANSWER: Hello! If you are unable to find a strong enough industrial tape I would recommend an adhesive putty that some other users have had success with. Here is a link to it:
Can i use as tub mat?
A shopper on Aug 23, 2018
BEST ANSWER: Personally I would not recommend this as a tub mat. It does not seem best suited for direct point pressure, such as for feet. It is also backed by a “fabric-type backing that would likely break down with copious amounts of water.
Would this work to put between a ‘plastic’ dorm mattress and a memory foam mattress topper? If so, would it still work if I put a sheet and mattress pad covering all of the layers together (dorm bed, aire-flow, memory foam)?
Kirsten F on Jun 27, 2018
BEST ANSWER: Hi Kirsten! Moisture tends to build up underneath a foam mattress that is sitting on a platform. It is not recommended to place the Aire-Flow between two mattresses. Please give us a call to discuss further!
how many feet should i get for a full mattress?
Curious10 on May 30, 2020
BEST ANSWER: My mattress was 60″ wide by 80″ long. The width of the moisture barrier material was less than 60″ so I had to have enough for 2 strips, 1 going across the head of the bed and 1 going across the foot of the bed. Therefore I needed 2 strips each being 60″ long for a total of 120″ or 10 feet.
Adjustable Bed – There are a couple of Q & A about adjustable beds but they did not address my concern. I have a memory foam mattress on an adjustable base and the base is covered in fabric. I’m concerned with the polymer side down against the fabric covered base. So, when adjusting the bed will the polymer be abrasive to the fabric covered base?
Sir Jeffrey on May 18, 2019
BEST ANSWER: I’m not the manufacturer. This is just my opinion (F. W. I. W. ). I would not think it would be abrasive. If I had an understanding of the need for the material covering the base, I might be better able to address your concern. The rational in which I use the material is to keep separation between the mattress and base for air movement or to allow the mattress to better breathe in a stagnant air space
Should the Hyper Vent be the same size as the wood platform or the mattress, which extends past the platform?
A shopper on Jul 1, 2020
BEST ANSWER: We would suggest the hypervent be the same size as the wood platform.
I have an adjustable bed that is a solid base. Can this be used in this application? If so, would it need to be attached to prevent shifting? Will it damage the mattress by rubbing during bed adjustments? Thanks
Sir Jeffrey on Apr 4, 2020
BEST ANSWER: Hello! We do not recommend using this product on an adjustable bed. Please give us a call if you have further questions!