Ultrasphere 4.5 Sleep Mat

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 reduce 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 bike-packing, 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-fueled 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.

• Weight: Regular 370g. Long Wide 505g
• Main fabric: 20D Recycled Polyester outer fabric with internal TPU Coating and fluorocarbon free DWR
• Dimensions:Regular: 183cm x 51cm x 8cm. Long Wide: 196cm x 64cm x 8cm
• R-value:4.3
• Packed size:Regular 15cm x 9cm / Long Wide 19cm x 9cm
• 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
• Thickness: 8cm
• 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