AliMed Original PF Night Splint Chronic pain from plantar fasciitis is often worse in the morning. Many professionals believe the pain is the result of contractures and muscle tightening while sleeping. Studies have demonstrated that sleeping in a night splint can materially lessen morning pain. The painful stretching process is eliminated by avoiding footdrop and accompanying muscle tightening. The footplate is set in 5 degrees dorsiflexion. The strap at the instep ensures that the foot sits in registration with the splint. Strap pads protect leg and instep from pressure. Liner included. Splint fits left or right foot. Specify size, see sizing below. Sizing: Small fits Women's shoe size 4 to 7-1/2. Medium fits Women's shoe size 8 to 10, Men's 6 to 8-1/2. Large fits Women's 10-1/2, Men's 9.