The Rab Exosphere 3.5 Self Inflating Sleeping Mat (665g) features an X-Core foam filling for lightweight comfort and insulation on milder nights. The two-way valve allows for quick inflation and minimal effort and a long day.   Details: Self-inflating X-Core™ system is quick and easy to use X-Core™ Foam Technology with weight-saving honeycomb construction boosts warmth, support and comfort R-Value: 3.4 Thickness: 5cm A hybrid rectangular shape allows various comfortable sleeping positions Low profile two-way valve for easy inflation and deflation Roll-away stuff sack with the repair kit included Fluorocarbon-free DWR repels moisture   Technical Specifications: Fabric Main: 20D Recycled polyester outer fabric with internal TPU coating and fluorocarbon-free DWR Insulation: X-Core™ Insulation (Polyurethane open cell foam) Weight: 630g Dimensions: Regular 183x5cm. Large 196x64cm Rab Exosphere 3.5 Self Inflating Sleeping Mat (665g) | Air Sleeping Mats | BananaFingers