This duvet is filled with care in Canada. The shell is made of crisp 260 thread count down-proof cotton and is filled with quality, ethically sourced 575 loft goose down. Down fill is soft and luxurious, made up of tiny, fluffy clusters, and makes for a light, yet high-performance duvets. Summer Weight is great for hot sleepers or warmer temperatures. It's a light, thinner-style duvet designed to provide only minimal warmth.