This duvet is made with soft, plush microfiber fill, a high quality polyester that's meant to mimic the softness of down. The shell is soft 300 thread count cotton. Microfiber doesn't have the same insulating properties as down, so microfiber duvets are heavier weight. A fair bit of fill is required to achieve the desired warmth. One benefit of a synthetic duvet is that it can be machine washed at home, given your machine is quite large and you wash/dry on a low heat setting. Natural down and feather are sensitive to moisture, but polyester is not! This generously-filled All Season Weight is warm enough for cold sleepers or cool room temperatures. Canadian Down & Feather Company is Canada's leading manufacturer and brand of down and feather sleep products. CDFC is passionate about innovative, smart design and environmentally-conscious production. They use only ethically-sourced materials that pass strict quality control standards, delivering products that are free of harmful substances, while still being fairly priced.