Rab Ultrasphere 1.5 Sleep Mat (340g)

Every gram matters when venturing fast and light, and the Ultrasphere 1.5 has been meticulously engineered with that philosophy in mind. Designed as the ultimate sleep mat for minimalist missions, it trims down both weight and bulk without compromising on performance. Its clever use of offset air chambers effectively interrupts convection currents, trapping warmth without relying on heavy insulation—perfect for summer overnights in the wild. Paired with an ultra-light, soft-touch fabric, this mat becomes an ideal companion for summer bikepacking, thru-hikes, and multi-day mountain running adventures.

Shaped in a compact, tapered mummy style, the mat offers a generous 8cm of cushioning to ensure a restful sleep that helps recharge energy levels for action-packed days on the trail. Camp setup is quick and fuss-free, thanks to a low-profile two-way valve and an included inflation sack.

Complete with a repair kit, the Ultrasphere 1.5 is adventure-ready, purpose-built for extended journeys where weight-saving gear makes all the difference.

Features

• Internal offset cut-outs help reduce weight while interrupting convection currents to retain warm air more effectively.
• The mat has an R-Value of 1.3, providing lightweight insulation for warmer conditions.
• It offers a thickness of 8cm, striking a balance between low weight and high comfort.
• When packed, the mat compresses down to a compact size of 18x9cm for easy stowage.
• The tapered mummy shape helps reduce unnecessary material and overall weight.
• A low-profile two-way valve makes inflating and deflating the mat quick and straightforward.
• A pump sack is included, allowing for rapid, hygienic inflation at camp.
• A roll-away stuff sack with an integrated repair kit is included to support self-sufficiency on longer trips.
  
  

Sustainability Features

• Fluorocarbon (PFAS) free fabric
• Fluorocarbon (PFAS) free product
• Made with renewable energy
  
  

Specifications

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