This European-crafted sheet set is OEKO-TEX® Certified, and made of 100% cotton in a silky sateen weave. This tightly woven special weave has a luxurious sheen and drapes beautifully, making it ideal for year-round comfort. Made with long mercerized cotton fibres, these sheets are also more durable and long-lasting, while still maintaining breathability and a soft, smooth hand. 300 thread count.100% cotton. Machine wash. Made in Portugal.