Made of 60% copper ion infused rayon derived from bamboo and 40% rayon derived from bamboo, this this cooling cooling fabric breathes better than cotton and it is the perfect addition to any bed Unlike cotton pillowcases our copper and rayon derived from bamboo pillowcases have a smooth surface with very little friction. This can help reduce split ends, frizz and dryness, you can rest easy knowing your hair will be soft and smooth upon waking up in the morning Our copper and rayon derived from bamboo fabric pillowcases are also temperature regulating unlike cotton which absorbs moisture, rayon derived from bamboo wicks aways moisture to keep you cool and dry all night long Machine wash in cold water and tumble dry in low heat