For Plantar Fasciitis medical research shows average recovery time of 18.5 days and 97.8% recovered within 8 weeks. ONLY medically proven soft night splint.Also effective for Achilles Tendonitis and Tight calves.Recommended by top podiatrists, physical therapists, orthopedic surgeons, athletics, and top sports medicine docs. The Strassburg Sock - REGULAR SIZE (Fits calf size up to 16 inches) (Measure AROUND calf at the widest point.)