Relieves Morning Heel & Calf Pain Gently Stretches Plantar Fascia & Achilles to Speed Healing Clinically-Proven Adjustable Stretch Heel-Free Design is Cool & Comfortable Relieves Heel Pain, Plantar Fasciitis & Achilles Tendonitis Speeds the healing process of plantar fasciitis and achilles tendonitis. Maintains foot position to stretch while resting or sleeping. Helps minimize tears when first walking after periods of rest. Fits right or left foot. Available sizes: small and large.