The Rab Ultrasphere 4.5 Sleep Mat helps you when both warmth and low weight are crucial, the award-winning Ultrasphere 4.5 is the ultimate packable, featherlight air mat. Its ground-breaking design includes two layers of heat-reflective TILT, which reduces radiant heat loss, and offset air chambers that trap heat within the construction, allowing you to recharge comfortably without the need for high-volume insulation. Combined with a soft, exceptionally lightweight fabric, the mat’s weight-saving construction makes it ideal for bikepacking, thru-hiking, and multi-day mountain running.

With a comfortable tapered mummy shape that eliminates unnecessary bulk, 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 and unrivalled warmth-to-weight ratio, the Ultrasphere 4.5 is honed for fast-paced exploring in demanding mountain conditions.

While compatible with any sleeping bag, the Ultrasphere 4.5 can be paired with Rab's Mythic Ultra 120 Modular bag to form an ultralight sleep system weighing under 700g.

Rab Ultrasphere 4.5 Sleep Mat 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
• R-Value: 4.3
• Thickness: 8cm
• Packed size: 18x9cm
• 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

Rab Ultrasphere 4.5 Sleep Mat Specifications:

• Weight - Long wide: 505g / 17.8oz
• Main fabric - 20D Recycled Polyester outer fabric with internal TPU Coating and fluorocarbon-free DWR
• Dimensions - Long wide: 196cm x 64cm x 8cm
• R-value - 4.3
• Packed size - Long wide: 19cm x 9cm (7.5in x 3.5in)