COPPER FIT® RAPID RELIEF BACK SUPPORT provides custom compression plus hot/cold therapy. Adjustable, copper-infused polyester/spandex wrap has a removable lumbar support to help improve posture and ease pain. Reusable hot/cold gel pack offers targeted relief. Wear over or under clothes. S/M fits waist sizes 28"- 39"; L/XL fits waists 39"- 50". Hand wash. Imported.