The Cirrus Hut Slippers are filled with PrimaLoft Silver Insulation Luxe, a synthetic insulation made entirely from recycled plastic bottles. The nylon lining and durable Pertex Quantum outer are also made from recycled materials. The lower edge of the slipper is reinforced with tough nylon for increased durability, while the cushioned EVA foam footbed increases comfort.Tough 600D nylon edge for abrasion resistanceLoose-fill synthetic insulationElasticated entryNon-slip PU outsole with EVA padded sole unit for comfortRear pull-on loopOuter Fabric - Recycled 30D Pertex Quantum with fluorocarbon-free DWR (50gsm)Lining - Recycled, soft 20D fabricPrimaLoft Silver Insulation Luxe 100% post-consumer recycled synthetic insulationWeight: 172gSizing: S (5-6) / M (7-8) / L (9-10) / XL (11+)