PURE NATURAL COTTON- Woven from the finest Cotton Yarns, this makes it very comfortable to use at night as it rests on the skin very gently and soothes one to sleep, And with the natural thread, It holds up extremely well over time, No Pilling Issue, No Sweating sleeping DETAILS- 4 Interior corner-ties keep duvet insert securely in place, Customized wide opening with button closure is easy to use & 2 Inch flange Pillowcases come with side flap opening Apart from cotton we can also do all kinds of dobby designs duvet sets like swiss dot, micro checks, windowpane, etc in all thread counts and also in CVC polyester: cotton inseparable and non-separable yarn and also in cotton brushed flannel, 144 TC printed sheeting, etc.