This best-selling, puffy comforter (aka duvet) is made with white goose feather fill. Do you know the difference between down and feather? The shell is 233 thread count cotton, which is crisp and durable. This comforter is generously filled. Feather doesn't have the same insulating properties as down, so feather comforters are heavier weight. We need a fair bit of fill to achieve the desired warmth. This comforter comes in All Season Weight, which works well for room temperatures around 60 – 65 degrees F or if you’re fairly cool when you sleep. Features: Box Construction: Boxes to prevent content from shifting 233 Thread Count: Prevents fill from escaping 100% Cotton: Fine cotton allows the fill to breathe Corner Loops: Loops on all 4 corners to tie and anchor the comforter in place White Goose Feather: Filled with small white goose feather to provide better lofting and insulation. Hypoallergenic: Anti-microbial process used to eliminate bacteria. Guaranteed Quality: Guaranteed against manufacturing defects for 5 Years RDS Feather: Certified by IDFL TE-99972323 This product was tested for harmful substances and certified according to OEKO-TEX® STANDARD 100 VC025 232673 TESTEX