These unique sheets offer durability and comfort. Like the athletic performance fabrics that inspired them, SHEEX sheets feature temperature control by transferring body heat, and wicking properties that transport moisture. These features keep you dry and comfortable and offer a cooler, deeper sleep. Flexible microfibers provide a four-way stretch for freedom of motion and optimum fit. The sheets have advanced fade, wrinkle and shrink resistance, and breathe nearly 50% better than cotton. 87% polyester/13% spandex. Twin, Twin Extra Long, Full and Queen fitted sheets fit mattresses up to 15" deep. King and California King fit up to 17" deep. Twin and Twin Extra Long sets include flat sheet, fitted sheet and one standard pillowcase. Full and Queen sets include flat sheet, fitted sheet and two standard pillowcases. King and California King sets include flat sheet, fitted sheet and two king-size pillowcases. Machine wash. Imported. Additional pillowcases available separately.