On the chart below, locate your height and overarm measurement. To get your overarm measurement, stand with your hands by your sides and measure around the broadest part of your chest and arms.
Regular, Large, and XL refer to the quilt size 20", 25", and 30" refer to the sheet size
If you are an "active" sleeper or have a "wide" sleep position, consider sizing up to accommodate your sleep style.When in doubt, size up. Unlike mummy bags, there's no thermal disadvantage to a larger size Zenbivy because the quilt is always free to wrap snuggly around you. Bigger is always more comfortable and just as warm.
Sheet & Mattress Sizing
Zenbivy sheets are designed to fit most standard size mattresses on the market, in both rectangular and tapered styles.
Dry Sack Sizing
Find your Bed on the image below and match it to its recommended Dry Sack size. Don't worry, with the recommended size there will still be room to throw in your Zenbivy pillow and even a down jacket.
You can expect your Bed to compress down to abouthalfthe size of its recommended Dry Sack.Example: 7L compresses down to 3-4L, 10L down to 5L, etc
The most comfortable camp mattress ever designed. Our 4-way stretch fabric allows this mattress to “flex” with your shape and movement, so the top feels softer and more supportive than other camp mattresses - even at firm air pressures. Our slow-deflation valve feature allows for customizable comfort. Simply lay on the mattress and push the "button" to slowly deflate to the desired firmness until it feels as close as possible to your bed at home. Horizontally cored foam eliminates the cold spots found on most vertically cored mattresses and delivers a full R-value 5 for EN-matched performance.
Long gone are the lightheaded days of blowing up your mattress by breath. The Flex Mattress includes our Inflation Dry Sack for easy inflation in under a minute. Simply snap the Inflation Dry Sack onto the mattress valve and push the air through.
Includes the Flex™ Mattress, Inflation Dry Sack, and repair kit
All-Season Warmth — Only mattresses with an R-value 5 or greater will meet the thermal performance of EN-rated sleeping bags. Most mattresses on the market today that are advertised as “3-season” do not provide the warmth required to match EN-rated bags. The Zenbivy Flex Mattress has an R-value of 5 for EN-matched performance and all-season warmth: no cold spots!
Silent Comfort — Fall asleep and stay asleep. The Flex Mattress's horizontally-cored foam insulation makes for a silent night at camp. The 4-way stretch fabric allows this mattress to “flex” with your shape and movement, so the top feels softer and more supportive than other camp mattresses - even at firm air pressures.
Fast Inflation — The included oversized Inflation Dry Sack is sized perfectly for the fastest inflation time and doubles as fully-welded storage to keep the mattress reliably dry when packed.
Smart Valve — The one-way reversible valve keeps air in while inflating and allows for customizable comfort with its slow-deflation "button”. When it's time to pack up, the entire valve pops out for instant, hassle-free deflation. Then pop the "deflation" valve side back in and the air stays out as you continue to roll.
R-value: 5 (Note: only mattresses with an R-value of 5 or greater will deliver full temperature rating performance from EN-rated sleeping bags)
Weight 20x72: 2 lb 2 oz (0.96 kg) 25x72: 2 lb 7 oz (1.10 kg) 25x77: 2 lb 11 oz (1.22 kg) 30x80: 3 lb 11 oz (1.67 kg)
Inflated Size 20x72: 20” x 72” x1.75” (51 x 183 x 4cm) 25x72: 25" x 72" x 1.75" (63 x 183 x 4cm) 25x77: 25” x 78” x 1.75” (63 x 198 x 4cm) 30x80: 30” x 78” x 1.75” (76 x 198 x 4cm)
Packed Size 20x72: 10” x 6” (25 x 15cm) 25x72: 13" x 6" (33 x 15cm) 25x77: 13” x 8” (33 x 20cm) 30x80: 15” x 8” (38 x 20cm)
Horizontally-cored foam cuts weight and eliminates the cold spots found on most vertically-cored mattresses and delivers a full R-value of 5 for EN-matched performance.
Supportive 4-way Stretch
Our 4-way stretch fabric allows this mattress to “flex” with your shape and movement, so the top feels softer and more supportive than other mattresses, even at firm air pressures.
The reversible valve keeps the air in while inflating and its slow-deflation "button" lets you dial in your exact comfort level. When it's time to pack up, the entire valve pops out for fast, hassle-free deflation. Snap it back in in "deflate" mode and the air stays out as you continue to roll.
Included Inflation Dry Sack
While the Flex™ Mattress will mostly self-inflate once you pop the valve open, it's helpful to have an Inflation Dry Sack to top it off to your desire comfort level. The Flex™ Mattress comes with a fully-welded Inflation Dry Sack for waterproof storage and easy manual inflation.
4.4Based on 28 Reviews
Write a ReviewAsk a Question
Thank you for submitting a review!
Your input is very much appreciated. Share it with your friends so they can enjoy it too!
Comfortable and warm no doubt. Big and heavy compared to others on the market yes. I expect it to be heavy with an R value of 5 so that’s not a problem. The 2 star for me comes down to the stuff sack. It’s too small for the pad and ripped the second time I tried to put the pad in. As someone who packs up camp every morning and is on the go, this one just plain doesn’t cut it. It would be great left at basecamp with a bigger after market stuff sack.
Just wrapped up a 3 week overlanding backcountry discovery routing tour of AZ, CO, and WY camping most of the time in a range of temps, mostly below 40 at sunrise. Ages at 53 and 76 years of age, both on tent cots using the 30x80. Filling and deflation with a flex air pump in less than a minute. What I like: Comfort. Warmth, but not hot. What I don't like, but can't change: size when deflated. Obviously these are heavier, larger beds made for car camping but with benefit of a smaller form factor than other cheaper self inflating foam beds and way more comfortable than the featherweight krinkly small form factor varieties. We had Nemo and Puffle tops but I trust the Zenbivy brand to incorporate their quilts and other sleeping gear. No pressure loss by mornings and no "cold" spots sleeping directly on the pads, really impressive. I believe it was the pad that saved me one 25 degree morning under a 40 degree quilt with a cheap top quilt. I've used other brands of air pads that pack down, but they are loud, cold, and leak. Not so with these two so time will tell....