Product Description 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. R-Value Your sleep mat’s R-value is an indication of how well it will resist heat loss. A higher R-value means it will insulate you more effectively from the ground underneath and will be better suited to cold environments. TILT (Thermo Ionic Lining Technology) A radical, heat retaining tech that works like an emergency blanket reflecting heat back towards your body, while maintaining breathability and comfort. Boosting thermal efficiency, it keeps you warm when the temperature plummets. Fluorocarbon (PFAS) free product PFAS-free means Rab have phased out all intentionally added PFAS and are compliant with current EU and US legislation. 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. Roll-away stuff sack with repair kit included. SPECIFICATIONS Weight: 345g/12.2oz (Reg) Packed size: 18cm x 9cm (7.1in x 3.5in) R-value: 4.9 Thickness: 8cm. Shape: Tapered Mummy
