Rab Ionosphere 5.5 Sleeping Mat

The Rab Ionosphere 5.5 Sleeping Mat is a precision-engineered insulated air mat developed to deliver outstanding warmth in a compact, lightweight format for winter mountain use. Designed for alpinists and cold-weather adventurers, it combines a heat-reflective TILT lining with air-trapping Stratus™ R insulation to minimise heat loss through both radiation and convection. This dual-insulation system enhances thermal efficiency, making it suitable for frozen bivi ledges and high-altitude camps in sub-zero conditions. Balancing low weight with dependable comfort, it performs exceptionally well on long-distance ski tours, winter fastpacking routes, and multi-day alpine ascents.

Features: 
- The TILT reflective film inside the mat reduces radiant heat loss, boosting warmth for weight.
- Stratus™ R insulation traps air to prevent heat escaping through convection.
- Soft-touch, lightweight 20D fabric on the upper mat, with a 30D base for added durability on rough ground.
- Oversized outer chambers to keep you central on the mat.
- The versatile rectangular shape is comfortable whatever your preferred sleeping position.
- Inflation and deflation are quick and easy thanks to the low-profile two-way valve and pump sack.

Technical Specifications:
- Weight: 615g/21.7oz (Reg)
- Insulation: Stratus™ R insulation traps air and reduces heat loss from convective currents
- R-Value: 5.5
- Packed Size: Regular: 24cm x 12cm (9.4in x 4.7in)
- Thickness: 8cm
- Dimensions: 183x51cm