The bamboo duvet never goes flat and always come back! It combines a luxurious cover made with high-quality viscose from Bamboo fabric for an incredibly soft smooth feel with a special blend of a cotton and bamboo rayon fill that makes it adjustable for any sleep position. This duvet is temperature regulating, and breathable allowing sleepers to stay cool and comfortable through the night, while its multi-layer design provides a gentle warming feeling when you’re cold. It’s great for back sleepers, stomach sleepers and side sleepers! It is anti-Microbial and hypoallergenic and is incredibly soft and smooth. Perfect for all sleepers!