This bamboo duvet insert features ultra-soft 100-percent rayon from bamboo, 300 thread-count down proof cover. Our bamboo comforters have natural winking abilities that absorb better than other fabrics, specifically for those who experience frequent night sweats as comforter adapt to room and body temperature. It Also features baffle box stitching construction that prevents down alternative from shifting and keeps it evenly distributed inside your comforter for greater warmth. - Royal Hotel Brand- 100-Percent Bamboo Viscose Comforter Shell - 300 Thread Count per Square inch- Down Alternative Polyester- Medium -Extra Warmth- 4 corner ties to help keep comforter in place when used with a duvet cover- Temperature Regulated, Hypoallergenic, Baffle Box- Machine WashableAvailable Sizes Include:- Full/Queen size: 90 wide X 90" long with 73 ounces of polyester fill.- King/Cal-king size: 106 wide X 90" long with 86 ounces of polyester fill. The fiber fill works just like real down feathers.