The Pro Night splint provides a gentle stretch to help alleviate the pain and discomfort associated with plantar fasciitis and Achilles tendonitis.A soft padded thermoplastic dorsal shell helps hold the foot in a neutral , 90 degree position providing a moderate stretch and optimal comfort. Designed to provide a low profile, comfortable fit that's easy to apply. Strap closures around the foot and calf, and an open heel design allow for minimal, safe ambulation as needed. Two sizes fit right or left.