Jump to: Our Verdict / Features / Specifications
We're working out what we think - we'll add our view here!
Rab says:
Combining TILT, ultralight fabric and heat-trapping offset air chamber construction, this featherlight air mat offers superb warmth for weight and packability. Highly comfortable, it's the ideal foundation for thru-hiking and multi-day mountain runs.
Our Verdict
We're working out what we think about Rab's Ultrasphere 4.5 Sleeping Mat - Regular Wide, we'll add our comments here in due course.
- Reviewed by Basecamp Gear
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.
Features
- 2 layers of TILT reflective film help reduce radiant heat loss without adding weight or bulk
- Offset weight saving internal cut outs help disrupt the flow of convection currents and keep warm air static
- Tapered mummy shape to save weight
- 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: 467g (ex bags)
- Pump Sack Weight:71g
- R-Value: 4.3
- Thickness: 8cm
- Packed size: 18x9cm
Material & Construction
- Main: 20D 100% Recycled Polyester TPU coated. Internal Beam: 15D Polyamide TPU Coated
- 20D Recycled Polyester outer fabric with internal TPU Coating and fluorocarbon free DWR
