A sleeping mat for people who weigh their gear, then weigh it again. The Ultrasphere 1.5 is 340 g in Regular and packs down to 15 x 9 cm. Rab offset the air chambers inside to break up the air currents that carry your heat away, so it keeps you warm without bulky insulation. It's 8 cm thick with a tapered mummy shape, and the low-profile two-way valve and included pump sack get it up quickly at camp. Be honest about the season, though. With an R-value of 1.3 it's a summer mat, made for bikepacking, long-distance tramps and fast trips in the mountains, not for frosty winter ground.

Sustainability

Fluorocarbon (PFAS) free

Rab have phased out all intentionally added PFAS in this mat, and the fabric's DWR is fluorocarbon free.

Recycled outer fabric

The 20D outer fabric is recycled polyester.

Features

• Offset internal cut-outs disrupt convection currents and keep warm air still
• Tapered mummy shape to save weight
• Low-profile two-way valve for easy inflation and deflation
• Pump sack included for quick, hygienic inflation
• Roll-away stuff sack with repair kit included

Rab rate its comfort three out of five, which is fair. This one is about grams, not luxury. The repair kit comes along because the one sharp stick in the campsite always finds you.

Specs

• Weight: Regular 340 g, Long Wide 476 g
• Size: Regular 183 x 51 x 8 cm, Long Wide 196 x 64 x 8 cm
• Packed size: Regular 15 x 9 cm, Long Wide 19 x 9 cm
• R-value: 1.3
• Fabric: 20D recycled polyester with internal TPU coating and fluorocarbon free DWR
• Colour: Dark Pewter
• Product code: QMA-07