100% Cotton Enjoy Your Sleep: 100% cotton soft outer and fluffy all-season down comforter, lightweight and breathable, brings you warm and sweet sleep. Lightweight & Downproofness: Skin-friendly goose feather down filling keeps you warm and ultra lightweight. Upgrade downproof cotton fabric cover added a special healthy coating to aviod leakage and keeps you away from sniffling, sneezing and itchy. Friendly Design : Built-in corners secure your favorite quilt in right place. Feathers clump distributed evenly throughout the duvet insert without worry bunching or shifting. Machine Washable: Gently washed with cold water, then sun dry or tumble dry it. Please note: Too frequent washing will somehow influence the heat preservation performance so do not wash it too much. Warm Tip: Our down comforter is compressed during transportation, so please release it for 2 – 3 hours when you received then pat the surface to restore fluffy. Any question, please CONTACT US immediately.