Graduated Support Relieves Tired , Aching Legs and Feet . 78%cotton+22%spandex Reinforcement on the heel and toe. Machine Wash Graduated compression of 8-15mm Hg to help circulation,May reduce swelling,energize your legs. After-sales Service: If you are not completely satisfied with your purchase, we are happy to offer a refund or replacement. Free return within 30 days.