The 100% long-staple silk adjusts to your body temperature and shape and drapes perfectly around you. Silk Comforters let your skin also breathe while you sleep, so you will stay warm and comfortable all night long without overheating. In addition, it provides you with a healthier sleep environment from the natural hypoallergenic qualities, which are less likely to grow bacteria as they are naturally anti-fungal. Shell Fabric: 68%/32% Rayon/cotton, Fill Material: 100% long staple silk.