Sleeve raises and supports the plantar fascia, the band of connective tissue that maintains the arch, so you feel less pain. * Cotton-covered sleeve allows feet to breathe to prevent foot odor and perspiration. * Sleeves can be worn alone or under socks and/or stockings. * Care: Hand wash with mild, soapy water. Air dry. Do not put in the dryer. * Material content: Seamless cotton covered elastic.