Flex™ Air Mattress
Flex™ Air Mattress - 25x78 / Rectangular is backordered and will ship as soon as it is back in stock.
Size Guide
The quilt is sized to fit you. The sheet is sized to fit your mattress.
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CLIP quilts and sheets are sold separately.
Sizes can be mixed & matched to create the fit that’s right for you and your mattress. All clip quilts are compatible with all clip sheets regardless of size, style, or temperature rating.
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ZIP quilts and sheets are sold together.
Your mattress may determine what size quilt you get. For example, if your mattress requires a 30” sheet you will need to get the XL 30” ZipBed which comes with an XL quilt.
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.
Quilt Sizing
On the chart below, locate your height and overarm measurement. To get your overarm measurement, stand with your arms hanging relaxed by your sides and loosely measure around the broadest part of your chest and arms.
Sheet Sizing
Zenbivy sheets are designed to fit most standard size mattresses on the market, both rectangular and tapered styles. Sheets fit rounded-edge mattresses up to 4” thick and 3D-style mattresses up to 3.5” thick.
Quilt Dimensions
Backpacking quilts are measured by the cut-fabric dimensions. Filled and lofted quilts will be shorter/narrower. On average:
- 25°F quilts are approximately 2” shorter in both directions, for all sizes
- 10°F quilts are approximately 4” shorter in both directions, for all sizes
Convertible quilts are 6” longer when open/flat.
Circumference
The maximum circumference around your shoulders/hips/feet for each size combination when the quilt is attached to the sheet.
Dry Sack Sizing
Both the quilt and sheet will fit in the recommended Dry Sack size and there will still be room to throw in your Zenbivy SoftTop™ Pillow or a down jacket.
You can expect your bed to compress down to about half the original size of the Dry Sack. Example: 7L compresses down to 3-4L, 10L down to 5L, etc
Description
Description
The Flex™ Air Mattress is the only ultralight air mattress to feature a 4-way stretch top. In combination with the supportive offset air cell structure, there's truly a "wow" moment when you lay on it. Starting at 567g, delivering EN/ISO-matched warmth, and packing down to just 6.5 x 3 inches, the Flex™ Air Mattress is ultralight backpacking luxury.
Pro Tip: Our Flex™ Air Mattress performs best when fully inflated - so don't hold back! The more air, the more comfort and warmth. Even at max air pressure, the air cells and 4-way stretch fabric ensure you'll feel supported yet cushioned.
Product Specs
Explore the Features
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Exclusive 4-Way Stretch Top
All other camp mattresses use tightly woven fabrics that do not stretch. These surfaces transfer weight across the mattress and can feel both stiff and “bouncy”. Our Flex™ mattresses feature an exclusive 4-way stretch fabric that forms instantly to your shape and movement, both minimizing weight transfer and relieving pressure points.
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Ultra-Compact
Rolling down to just 6.5" x 3", the Zenbivy Flex™ Air Mattress is ultra-compact and hardly takes up any space in your pack.
Explore the Materials
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Mylar Layers
Mylar is a popular insulation choice for ultralight camp mattresses, but unlike other ultralight mattresses that are crinkly, loud, and provide insufficient warmth, our mattress's mylar layers “float” within to quietly reflect heat and deliver R4.5+ for EN/ISO-matched performance.
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Laminated Fabrics
Other mattresses use coated fabrics which can break down over time, making them less durable and, therefore, less reliable. We laminate a PU (polyurethane) membrane to our fabrics. This separate membrane does not break down and the welds are stronger, resulting in a more durable and long-lasting mattress.
