The OS1st FS6+ Performance Foot Sleeve provides relief from plantar fasciitis, Achilles tendonitis, shin splints, and more using support and graduated, medical-grade compression. This foot and calf sleeve stabilizes the Achilles, adds compression to the calf and shin, and keeps the plantar fascia compressed and stretched, encouraging better circulation and providing structure and stability. OS1st's Compression Zone Technology applies varying levels of pressure to 11 different zones, giving you just the right amount of compression in each area of the foot and lower leg to promote circulation and hasten recovery while keeping you comfortable at rest or during workouts. With a slim profile, the OS1st FS6+ Performance Foot Sleeve can be comfortably worn under another pair of socks. During workouts, moisture-wicking fabric helps keep the sleeve on securely, preventing chafing and making sure it stays in place no matter what you're doing! It's also great for resting, allowing your feet to heal while you're sleeping. Each package comes with a pair of sleeves.

Sizing (by arch/ankle/calf circumference and shoe size):

Small - 5″ - 8″ / 12 - 21 cm | 6.5″ - 8.5″ / 17 - 22 cm | 9.5″ - 14.5″ / 25 - 37 cm | M 3 - 5.5 / W 4 - 6.5
Medium - 7″ - 10″ / 18 - 26 cm | 8.5″ - 10.5″ / 21 - 27 cm | 12″ - 17″ / 30 - 43 cm | M 6 - 9.5 / W 7 - 10.5
Large - 9″ - 13″ / 23 - 33 cm | 9.5″ - 12.5″ / 25 - 31 cm | 14″ - 19″ / 35 - 48 cm | M 10 - 13 / W 11+
X-Large - 11″ - 15″ / 28 - 38 cm | 12″ - 14″ / 30 - 35 cm | 14.5″ - 20″ / 37 - 50 cm | M 13.5 - 15
XX-Large - 13″ - 18″ / 33 - 46 cm | 13″ - 16″ / 31 - 41 cm | 16″ - 23″ / 40 - 59 cm | M 15.5+