Polycotton 【All Season Warmth】This all-season feather down comforter is medium weight and 35 oz weight.Filled with 50% goose down fiber, 25% goose down, 15% goose feather fiber, 10% goose feathers. Provide you all year softness and fluffy. With RDS and DOWN PASS certified goose feathers and down, the duvet insert is odorless and ethical harvest. You can enjoy a hotel quality comforter at home. 【Soft Fabric】Brushed 400 thread count polycotton. Blend of 18% organic certified cotton and 82% polyester as cover fabric. And the cotton is organic certified. The blended cover is featured as soft, breathable, anti-wrinkle. Durable for use. 【Box Design】The design of box-stitch quilting keeps the filling in place and prevent any leaking during the night. It ensures the filling spreading evenly in every box and avoid clumping. 【Exquisite Details】4 corner tabs and 4 side tabs make the duvet insert easy to put on a duvet cover. 【How to Care】Delivered with vacuum pack, please fluffy it up gently and wait a few hours. Machine washable or dry wash. Tumble dry on low heat.