For mountain expeditions where every gram matters, the Ionosphere 5 is ultralight and packable, yet loaded with the necessary tech to keep you warm in tough conditions. The TILT reflective film within the insulation reduces radiant heat loss, while the Stratus™ R insulation traps air to lessen heat loss through convection, ensuring you can recharge for tomorrow even when the temperature plunges. The tapered mummy shape is economical on weight, keeping pack size to a minimum. Oversized outer chambers ensure you stay centered on the mat as you sleep, and the soft-finish fabric features a graduated grip print to reduce sleeping bag slip during the night. Inflation and deflation are quick and easy thanks to the low-profile two-way valve and pump sack. The Ionosphere 5 is built using 100% recycled insulation, recycled fabric and a fluorocarbon-free DWR, and offers a superb warmth-to-weight ratio which won’t hold you back.

Stratus™ R insulation traps air and reduces heat loss from convective currents
TILT reflective film within the insulation helps reduce radiant heat loss
R-Value: 4.8
Thickness: 3.15 (8 cm)
Lightweight construction uses air and insulation for superb warmth-to-weight ratio and minimal pack-size
Oversized outer chambers help keep you centered on the mat
Graduated grip print finish on upper fabric reduces sleeping bag slip
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
Dimensions: Regular 72 x 20 in (183 x 51 cm), Large 77 x 25 in (196 x 64 cm)
Packed size: Regular 9 x 4.3 in (23 x 11 cm), Long Wide 11 x 4.7 in (28 x 12 cm)
Weight: Regular 19.4 oz (550 g), Long Wide 28.6 oz (810 g)
Insulation: Stratus™ R 100% recycled polyester insulation 160gsm with TILT
Main fabric: 20D Recycled Polyester outer fabric with internal TPU Coating and fluorocarbon free DWR