The Rab Ionosphere 5 Sleeping Mat is an insulated sleeping mat built for extreme winter conditions and minimal weight. With a smaller pack size than the 5.5, it features a tapered mummy shape to minimise bulk in your pack. Like the bigger model, it's made for extreme winter conditions but will better suit alpinists and mountaineers who prioritise minimalism.   Details: 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: 8cm Lightweight construction uses air and insulation for a superb warmth-to-weight ratio and minimal pack-size Oversized outer chambers help keep you centralised 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 a repair kit included   Technical Specifications: Fabric Main: 20D Recycled Polyester outer fabric with internal TPU Coating and fluorocarbon-free DWR Insulation: Stratus™ R 100% recycled polyester insulation 80gsm with TILT Weight: 475g / 16.7oz Dimensions: Regular 183x51cm. Large 196x64cm Rab Ionosphere 5 Sleeping Mat (550g) | Insulated Sleeping Mats | BananaFingers