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The Flextail R05 Zero Mummy Sleeping Mat offers comfort, insulation, and portability at an attractive price. Its R-value of 5.6 makes it a four-season solution, and its 3.9-inch thickness rivals home mattresses. Despite its size, it weighs only 522g and packs down to a compact 12.5 x 23cm.
Flextail says:
A 3.9-inch (10 cm) thick profile and U-shaped high-low structure design, deliver premium backcountry comfort while keeping the weight to a minimum.
With an impressive R-value of 5.6, ZERO MATTRESS R05 MUMMY adopts a vertical tube structure, which possesses excellent insulation performance, keeping you warm and cozy even in chilly outdoor conditions. Good for year-round, and perfect for outdoor adventures such as backpacking, and hiking.
Weighing just 18.3oz and packing down to 12.5*23cm/5*9in, ZERO MATTRESS R05 MUMMY is incredibly portable, allowing you to bring luxurious comfort to any campsite or trail. Featuring a user-friendly design, this mattress inflates and deflates quickly with FLEXTAIL ZERO PUMP, allowing you to set up camp in minutes and pack up with ease.
Our Verdict
The Flextail R05 Zero Mummy Sleeping Mat is a standout option for backpackers and hikers seeking comfort without compromising on packability. This impressive sleeping pad strikes an excellent balance between insulation, thickness, and portability at a very attractive price point.
One of the mat's most notable features is its high R-value of 5.6, making it a true four-season sleeping solution. This rating ensures excellent insulation from the cold ground, keeping you warm even in chilly conditions. The vertical tube structure and 7-layer insulation contribute to this impressive thermal performance.
At 3.9 inches thick, the R05 Zero offers plush comfort that rivals many home mattresses. The U-shaped high-low structure design helps distribute your weight evenly, reducing pressure points and ensuring a good night's sleep after a long day on the trail.
Despite its generous thickness and insulation, the mat remains surprisingly lightweight at just 522g. It also packs down to a compact 12.5 x 23cm, making it easy to stow in your backpack without taking up precious space.
The user-friendly inflation and deflation system, compatible with Flextail's Zero Pump, allows for quick setup and breakdown at camp. This efficiency is a welcome feature when you're tired from hiking or eager to hit the trail in the morning.
One thing I will say is that the stuff sack is ridiculously small. You can just bring a different stuff sack, but I'm not sure why brands still do this.
- Reviewed by Ultralight Outdoor Gear
Features
- Ultralight comfort
- 5.6 R-value year-round warmth
- Ultra-compact design
- Standpipe structure
- Easy inflation and deflation
- Available in 2 size options
Specifications
- Weight: 522g(excluding bag)
- Size: 183 x 55 x 7cm / 72 x 21.6 x 2.8in
- Packed dimensions: 12.5 x 23cm / 5.9in
- Thickness: 10cm / 3.9in
- ASTM R-Value: 5.6
Material & Construction
- Thermal insulation
- 7-layer insulation structure
ASTM R-Value:
From 2020, there is a new industry standard for measuring the R-value (level of insulation) of sleeping mats – ASTM F3340-18. This new standard is the sleeping mat equivalent to the EN rating for sleeping bags. You can now directly compare the R-value of mats rated using the ASTM F3340-18 with confidence that is a fair and accurate comparison between mats. In simple terms, the higher the R-value, the warmer the mat.
In general terms, an R-value below 2.0 is for summer use, 2.0 to 4.0 is for cooler 3 season use and 4.0+ is for winter temperatures. This will be also be dependent on your sleeping bag, how cold you sleep etc. Please contact our customer service team if you need advice on choosing the right mat for your activity.
