Jump to: Our Verdict / Features / Specifications
We're working out what we think - we'll add our view here!
Rab says:
Lightweight and compact, the Stratosphere 4 boasts a superior warmth-to-weight ratio, making it a versatile all-mountain sleep mat which has a small enough pack size to take on all your trekking, climbing and backpacking adventures. The recycled Stratus™ R insulation is designed to trap air and reduce heat loss through convection, helping to maintain your temperature when the mercury drops and ensuring you recharge ready for tomorrow’s challenges.
The mat features a low-profile two-way valve and comes with a handy pump sack, so it’s quick and easy to inflate when you’re ready to hunker down for the night. Oversized outer chambers keep you in the centre of the mat and stop you rolling off in your sleep, while the spacious rectangular shape will ensure a comfortable night’s rest whatever your preferred sleeping position.
Constructed using 100% recycled insulation and recycled outer fabric finished with a fluorocarbon-free DWR, the Stratosphere 4 is a robust and reliable sleep mat which you can depend on to keep you comfortable, warm, and well-rested.
Our Verdict
We're working out what we think about Rab's Stratosphere 4 Sleeping Mat, we'll add our comments here in due course.
- Reviewed by Ultralight Outdoor Gear
Features
- 75D Recycled Polyester outer fabric with internal TPU Coating and fluorocarbon free DWR
- Stratus™ R 100% recycled polyester 160gsm insulation
- Stratus™ R insulation traps air and reduces heat loss from convective currents
- Lightweight construction and insulation for superb warmth-to-weight ratio and minimal pack size.
- Oversized outer chambers helps keep you centralised on the mat
- Hybrid rectangular shape allows various comfortable sleeping positions
- Low profile two-way valve for easy inflation and deflation
- Pump sack included for rapid and hygienic inflation
- Roll-away stuff sack with repair kit included
Specifications
- Weight: 890g (excluding bag)
- Dimensions: 183 x 64 cm
- Thickness: 8cm
- Packed size: 30 x 14 cm
- R-Value: 3.8
Material & Construction
- 75D Recycled Polyester outer fabric with internal TPU Coating and fluorocarbon free DWR
- Insulation: Stratus™ R 100% recycled polyester 160gsm insulation
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.
