Jump to: Our Verdict / Features / Specifications
We're working out what we think - we'll add our view here!
Rab says:
We’ve slashed weight and volume wherever we can with the Ultrasphere 1.5, crafting the definitive sleep mat for when every gram counts. It uses innovative offset air chambers to disrupt the flow of convection currents inside and trap heat, keeping you warm on wild overnights without the need for bulky insulation. Combined with a soft, exceptionally lightweight fabric, its weight-saving construction makes it ideal for summer bikepacking, thru-hiking, and multi-day mountain running.
With a comfortable tapered mummy shape that keeps things compact, the mat is thick and supportive, so that you can catch vital rest and restore the energy reserves needed for your action-fuelled days on the trail. When it’s time to pitch for the night, the low-profile two-way valve and inflation sack make camp setup quick and easy.
Featuring an included repair kit, the Ultrasphere 1.5 is fully equipped for your multi-day trips where low weight and bulk are critical.
Our Verdict
We're working out what we think about Rab's Ultrasphere 1.5 Sleeping Mat - Long, we'll add our comments here in due course.
- Reviewed by Basecamp Gear
Features
- 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: 494g (excluding bag)
- Pump Sack Weighs: 44g
- Dimensions: 196 x 64cm
- R-Value: 1.3
- Thickness: 8cm
- Packed size: 18x9cm
Material & Construction
- 20D Recycled Polyester outer fabric with internal TPU Coating and fluorocarbon free DWR
- Main: 20D 100% Recycled Polyester TPU coated
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.
