The Rab Ionosphere 5.5 Sleeping Mat best suits freezing bivys thanks to its high level of insulation. Made to trap as much heat as possible, resist moisture, and be as comfortable as possible whilst maintaining a low weight, this insulating sleeping mat is the go-to choice for extreme mountain conditions.   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: 5.5 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 A hybrid rectangular shape allows various comfortable sleeping positions 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 200gsm insulation with TILT Weight: Reg: 690g. LongWide: 950g Dimensions: Regular 183x51cm. Large 196x64c Rab Ionosphere 5.5 Sleeping Mat (690g) | Insulated Sleeping Mats | BananaFingers