Experience a luxurious sleep in the silky soft feel and texture of rayon from bamboo. Stay comfortable in all temperatures. Naturally hypoallergenic and highly resistant to dust mites. Each set includes 1 flat sheet, 1 fitted sheet, and 4 pillowcases. Twin and Twin XL sets only include 2 pillowcases. The sheets are made from 40% rayon from bamboo and 60% microfiber polyester. Rayon is distinctive for its unique strength and durability. These fibers are even thinner than most natural fibers such as silk. Woven tightly and double brushed, it guarantees extra strength and durability. This fabric has desirable properties such as stain resistance, breathability, wrinkle resistance, luxurious appearance, and easy cleaning. Make the switch and indulge in the comfort of bamboo today!