Stops Feather from Poking Through Bothered by the stabbing quill of the down pillow? Try our feather proof pillow covers, which are with additional layers and actually keep the feathers in for a better sleeping experience. Soft & Smooth The surface is made with bamboo viscose blend material, a fabric know as more breathable and soft to the skin Ultimate Protection to Pillow Our waterproof pillow protectors are coated with advanced membrane, protect your pillows from all kinds of liquids, sweats or other kinds of stains. The fine teeth zipper keeps all size of stains from in and out the pillow. Care Instruction Machine washable. Tumble dry on a low heat or air dry. Do not bleach, iron or dry clean.