Features1Nylon outer layer, waterproof and windproof, easy to clean and maintain. 2Ultra-light down material, warm and lightweight. 3Elasticized cuffs effectively concentrate heat. 4Adjustable strap for easy on and off. 5Suitable for various environments, outdoor camping, also can be used as indoor slippers.SpecificationMade from soft, warm and comfortable goose down, keep your feet nice and warm in cold weathers. A must have for wooden floor, carpet and camping, backpacking, etc.Features:Nylon outer layer, waterproof and windproof, easy to clean and maintain.Ultra-light down material, warm and lightweight.Elasticized cuffs effectively concentrate heat.Adjustable strap for easy on and off.Suitable for people with cold feet. Can be used as indoor slippers, outdoor socks for sleeping bag, tent.Specifications:Material: Nylon + Goose DownColor: BlackSize: S/M (Optional)Sole Length:S24cm for leg length 22.5-22.3cmM25.5cm for leg length 23.5-24.3cmPacking Size: 40*30*8 cmPacking Weight: 400gPackage List:1 * Pair of BootiesPackage List1 * Pair of Booties