Filling:90% White Duck Down, The socks slippers of the down filling power is 650.Boots designed with fluffy down comfortable, breathable and Lightweight. Material: Shell:410T Water Proof Nylon; Lining: 410T Soft Nylon Taffeta; Using: This booties slippers are not designed to be walked in, perfect for camping, hiking, skiing, traveling, watching TV on sofa and sleeping when you are stationary, heating cold feet warm, suggest wear a sock inside to keep more warmer. Size: Blue, red, green, purple (US 7-US 9),Black Size (US 8-US 11.5), This Down Slippers suitable for moderate washed by hand, not suitable for machine washing, dry cleaning, can not be ironed and bleaching. Weight: approx 75??5g With Storage bag. Please check size information carefully before purchasing order.