Used for plantar fasciitis, Achilles tendonitis, ankle sprains, twists, heel spurs, swelling, stress fractures, splint issues, and inflammation.Improve foot circulation and stabilize ankle joint, thereby reducing inflammation, relieving the plantar fasciitis pain, shortening the recovery period of exercise and preventing ankle sprains and strains.80% Nylon +20% Spandex, measure the thinnest part of the ankle S 17-20cm M 20-23 cm L 23-27cm XL 28-31cm.The open toe design allows you to wear them with anything shoes, sandals, slippers, boot with insoles, and under any socks.Thin, breathable, anti-odor,moisture wicking soft fabric design enables you to wear alone or under another sock without feeling too thick, you stay dry and protected throughout your gym workouts, hiking, cycling, running, office work, and other sports & activities.