90% fine duck down lining, fluffy and warm, high density nylon shell and elastic leg open to keep water and wind out in cold winter. Great slippers for outdoor and indoor use.Feature:90% fine duck down lining, 600 filling power, very warm.410T high density nylon shell, water repellent and windproof.Elastic leg opening provides a snug fit and keeps out the cold wind.Super lightweight, cozy slippers packed in a pouch for convenient carry for outdoor camping, hiking and traveling and also great for indoor use.Specification:Material: 410T Nylon #43; Duck down liningSize: M(35-39) / L(40-44) (optional)M: 24 * 19cm / 9.4 * 7.4inL: 27 * 20cm / 10.6 * 7.8inWeight: 60-80g / 2.1-2.8ozPackage size: 70-90g / 2.4-3.1ozPackage list:1 * Pair of Camping Slippers