The Micro-Gel Polyester Duvet is made from a 100% micro-gel polyester fill, a fiber that has natural breathability, and provides proper air circulation leaving you with a cool uninterrupted sleep. The polyester fiber is then filled into a pure cotton shell that consists of 10” baffle box style patterns offering even coverage and comfort. Once filled, it is cotton piped and double stitched for long-lasting durability. The duvet fill fiber includes hypoallergenic properties, which helps decrease the collection of highly allergic dusts and pollen, making it a great choice for those with allergy sensitivities.