This king size duvet set wont crease in the wash so you wont have to wrestle with it on your ironing board woven in 70 cotton with 30 easy care polyester to help prevent creasing it has a 1000 thread count thats an amazing 1000 threads per square inch which is 5 times the density of some so called percale linen the silky smooth fabric has a lovely satin pin stripe design for an impeccable finish