STRASSBURG SOCK Regular Strassburg Sock Black One Size The ONLY medically proven soft night splint For Plantar Fasciitis, medical research shows average recovery time of 18.5 days with 97.8% recovering within 8 weeks. Also effective for Achilles Tendonitis and Tight Calves Recommended by top podiatrists, physical therapists, orthopedic surgeons, athletics, and top sports medicine docs.