When both warmth and low weight are crucial, the RAB Ultrasphere 5 is the ultimate packable, featherlight air mat, honed for fast-paced exploring in demanding mountain conditions.

Its groundbreaking design includes two layers of TILT, which boosts the mat’s warmth-to-weight ratio by reflecting heat back towards your body, all for a fraction of a gram. It also features new offset air chambers that trap heat within the construction, allowing you to recharge comfortably without the need for high-volume insulation.

Highly comfortable and supportive, the Ultrasphere 5 is the ideal foundation for thru-hiking, bikepacking, and multi-day mountain runs.

Rab Ultrasphere 5 Sleep Mat - Dark Pewter - Regular Features:

• Impressively light at just 345g (size regular), with uncompromised warmth at an R-value of 4.9.
• The new weight-saving construction uses offset air chambers to trap heat and keep you warm.
• Two layers of heat-reflective TILT reduce radiant heat loss without adding weight.
• Comfortable tapered mummy shape that eliminates unnecessary bulk.
• Soft, exceptionally lightweight 20D fabric.
• When it’s time to pitch for the night, the two-way valve and inflation sack make camp setup quick and easy.
• Thickness: 8 cm.
• Packed size: 18 x 9 cm.
• Roll-away stuff sack with repair kit included.

Rab Ultrasphere 5 Sleep Mat - Dark Pewter - Regular Specifications:

Weight: 345g/12.2oz (Reg)
Fabric: Lightweight 20D Fabric
R-value: 4.9
Packed size: 18 cm x 9 cm
Thickness: 8 cm
Includes: Roll-away stuff sack with repair kit included