Rab Ultrasphere 5 Sleep Mat (345g)
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From bikepacking through mountain ranges to multi-day trail running, this air mat offers a peerless warmth-to-weight ratio for ultralight missions.
Activities: Fast & light adventures, Mountaineering, Trekking
Shape: Tapered Mummy
- Weight: 345g/12.2oz (Reg)
R-value: 5.5
Packed size: Regular: 15cm x 9cm (5.9in x 3.5in). Regular wide: 19cm x 9cm (7.5in x 3.5in) Long wide: 19cm x 9cm (7.5in x 3.5in)
Dimensions: Regular: 183cm x 51cm x 8cm. Regular wide: 183cm x 64cm x 8cm. Long wide: 196cm x 64cm x 8cm.
When both warmth and low weight are crucial, the 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.
- Impressively light at just 345g (size regular), with uncompromised warmth at an R-value of 5.5.
- 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: 8cm.
- Packed size: 18x9cm.
- Roll-away stuff sack with repair kit included.