The sheet is sized to fit your mattress and the quilt is sized to fit you.
Locate your height on the ruler below to see which size quilt and sheet/mattress we recommend. Ideally, you'll want to fall somewhere in the middle of the range. If you find yourself in the yellow, you'll probably want to size up for the most comfortable fit. The chart below is based on the average weight for each height. Also note that if you are an "active" or "wide" sleeper (i.e. someone that moves around a lot), you may want to consider sizing up to allow yourself more space to sleep naturally.
When in doubt, size up. Unlike mummy bags, there is no thermal disadvantage to a larger size Zenbivy because it is always free to wrap snuggly around you. Bigger is always more comfortable and just as warm.
Questions? We're happy to help. Let us know your height, weight, and general sleep style and we'll help you find the right size for you.
The sheet is sized to fit your mattress, whether it's one of ours or your current mattress. Our sheets fit both rectangular and tapered mattresses. Note on 4-inch mattresses: our sheets will fit 4-inch thick mattresses with rounded sides, but they do not work on 3D vertical side wall mattresses that are 4" or greater.
DESIGN UPDATE: We are currently in the process of transitioning our fitted sheets over to an adjustable design to accommodate different mattress lengths. These sheets will be named 20", 25", and 30".
20" sheets will fit mattresses up to 20" x 72" x 3.5"
25" sheets will fit mattresses up to 26" x 78" x 3.5" (including 25x72 mattresses!)
30" sheets will fit mattresses up to 30" x 80" x 3.5"
See measurements for max shoulder/hip/foot circumference of each size Bed, along with the dimensions of just the quilt itself.
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 about half the size of its recommended Dry Sack. (Ex: 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.
(Note: only mattresses with an R-value of 5 or greater will deliver full temperature rating performance from EN-rated sleeping bags)
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)
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)
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)
Top: 4-way stretch 50d polyester knit
Bottom: 75d polyester taffeta
Foam: Urethane foam
Inflation Dry Sack Materials
Fabric: 30D Ripstop Nylon, 75D Polyester
Top Closure: 420D Double Side TPU, 20mm Buckle, 20mm D-Ring Release Valve
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.
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.
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.
It’s either bad seals or this thing is absolutely not meant to be rolled tight or stored for a long period of time. There is no noticeable puncture hole - and cannot hear a leak. But I’ll inflate to max capacity and within 5 minutes at room temperate it’s deflated down to 75% its original capacity. In cold weather it’s worse. Agreed with the commenter below.
Hi Tyler, So sorry to hear about the issues with your Flex Mattress. We have sent you a follow-up email to help get this resolved. Thanks!
Kept me warm. But lost alot of air throughout the night
Sorry to hear this! Please send us an email at firstname.lastname@example.org and we'll help get you back up and running.
Flimsy, cheaply made inflatable trash bags.
Hi David, We are sorry to hear you were disappointed with the Flex™ Mattress. If you would like to return it for refund, please let us know and we'll help you through the process. Thank you. -Kylie
Great sleep system that will allow me to be comfortable while camping with my scout troop or other adventures. Highly recommend
I was fortunate enough to be gifted this. The mat is simple in construction, but sturdy. I was surprised at how stiff I was able to make the bag, and it held up well to a full night's sleep without any leaking. A little bulky, but quality.