The Rab Ultrasphere 4.5 sleeping mat has been built for fast-paced mountain adventures, offering comfort without the bulk. Its innovative design uses two layers of heat-reflective TILT to reduce radiant heat loss, while offset air chambers trap warmth efficiently, with no need for heavy insulation. Crafted from ultra-light, soft-touch fabric, it’s ideal for bikepacking, thru-hiking, and multi-day runs. The tapered mummy shape cuts weight without compromising on support, helping you rest and recharge after tough days on the trail. Quick to inflate with a low-profile two-way valve and included sack, the mat also comes with a repair kit and delivers an exceptional warmth-to-weight ratio for demanding conditions.
Perfect For: Expeditions, Fast & light adventures, Mountaineering & Trekking
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:
R-Value: 4.3
Thickness: 8cm
Dimensions (Regular): 183cm x 51cm x 8cm
Dimensions (Long Wide): 196cm x 64cm x 8cm
Packed Size (Regular): 15cm x 9cm
Packed Size (Long Wide): 19cm x 9cm
Weight (Regular): 370g
Weight (Long Wide): 505g
Materials:
Main Fabric: 20D Recycled Polyester outer fabric with internal TPU Coating and fluorocarbon free DWR