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Game-Changing Comfort and Support

We're proud to introduce the revolutionary new Flex™ Air Mattress—the only ultralight air mattress to feature a 4-way stretch top. In combination with the supportive diagonal baffle pattern, there's truly a "wow" moment when you lay on it—an extraordinary comfort difference you have to sleep to believe.

Starting at 1 lb 4 oz, delivering EN/ISO-matched warmth, and packing down to just 6.5 x 3 inches, the Flex™ Air Mattress is ultralight backpacking luxury. We invite you to scroll through the features below!

Flex™ Air Mattress

$209.00

Size
Size Guide

Return & Exchange Policy

You may return items for up to 14 days after delivery for a full refund, less the original shipping fee. Returned items must be unused, with tags attached, and in the same new condition in which you received them. View our full return policy here.

International Duties & Taxes

Packages will be subject to import/duty fees upon arrival. International customers are responsible for these fees. See more details.

Description

Game-changing comfort and support! The Flex™ Air Mattress delivers EN/ISO-matched performance and is the only ultralight air mattress with a supportive 4-way stretch top.

Specifications

  • R-value
    4.8
  • Weight

    20x72: 1 lb 4 oz (567 g)

    25x72: 1 lb 8 oz (680 g)

    25x78: 1 lb 9 oz (709 g)

  • Inflated Size

    20x72: 21" x 72" x 3" (51 x 183 x 8 cm)

    25x72: 25" x 72" x 3"(63 x 183 x 8 cm)

    25x78: 25" x 78" x 3" (63 x 198 x 8 cm)

    *Flex™ Air Mattresses have a 5" taper, meaning the foot end is 5" narrower than the width.

  • Packed Size

    20x72: 6.5" x 3" (16 x 8 cm)

    25x72: 8" x 3" (20 x 8 cm)

    25x78: 8" x 3.5" (20 x 9 cm)

  • Insulation

    Two layers of mylar foil

  • Fabric

    Top: 4-way stretch 20D Recycled Polyester knit

    Bottom: 20D Recycled Polyester Tafetta

  • Includes

    Mattress, waterproof inflation storage sack, and repair kit

Explore the Features

  • 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.

  • Supportive Offset Air Cells

    The offset air cells create a diagonal baffle pattern that causes the mattress to twist against your body’s natural fold lines rather than collapse into them like horizontal and vertical baffles, resulting in a more supportive mattress.

  • Flush, High-Speed Valve

    The low-profile valve is large for fast inflation and instant dumping of air, and the slow-deflation "button" allows for customizable comfort. Plus, the whole valve is replaceable and repairable should you ever need it.

  • Included Inflation Sack

    Bigger does not mean faster! An inflation sack that's too big is just more material to wrestle. Our slightly oversized ultralight inflation sack (1.0 oz) is optimized for the fastest inflation time. It's quick and easy to use, just couple the inflation sack to the mattress valve and push air through.

  • Waterproof Storage

    The ultralight inflation sack doubles as waterproof storage for your mattress. Twist, stuff, and cinch it shut!

  • Tapered Shape

    The tapered shape saves weight and cuts bulk so it’s more compact and lighter in your pack.

  • 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

  • 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.

  • 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.

Flex™ Air Mattress

From $209.00
Game-changing comfort and support! The Flex™ Air Mattress delivers EN/ISO-matched performance and is the only ultralight air mattress with a supportive 4-way stretch top.

R-value

4.8

Weight

20x72: 1 lb 4 oz (567 g)

25x72: 1 lb 8 oz (680 g)

25x78: 1 lb 9 oz (709 g)

Fill/Insulation

Two layers of mylar foil

Fill Weight

-

Fabric/Materials

Top: 4-way stretch 20D Recycled Polyester knit

Bottom: 20D Recycled Polyester Tafetta

Packed Size

20x72: 6.5" x 3" (16 x 8 cm)

25x72: 8" x 3" (20 x 8 cm)

25x78: 8" x 3.5" (20 x 9 cm)

Includes

Mattress, waterproof inflation storage sack, and repair kit

Size

  • 20x72
  • 25x72
  • 25x78
(6)
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