Why do you need a plantar fasciitis night splint? --- Use a plantar fasciitis splint at night to keep the foot extended and to provide orthopedic support for sagging feet to reduce the effects of morning heel, ankle, and arch pain associated with plantar fasciitis, Achilles tendonitis, heel spurs, foot drop, flat feet, etc. One size fits most adult (male or female) feet (left or right) with an ankle circumference that fits 8.0 - 15.0 inches. Memory foam padding for optimal comfort --- Memory foam padding fits the shape of your foot and provides targeted support and optimal comfort --- it relieves pressure points and reduces transfer during movement. Other brands of foam padding do not provide as good a feel as memory foam. Other brands with only one dorsiflexion strap cannot provide as good support as we do. How do I properly use my plantar fasciitis foot brace? --- When receiving your foot brace, adjust the bendable aluminum strip on the instep to your needs to hold your foot at an effective and comfortable support angle of 85 to 90, then wear the brace properly as directed to relieve your foot pain and help you get a full night's sleep. Specifications: Single brace + massage ball