A walking boot protects the foot and ankle and is common when someone has broken their leg or foot, is struggling from shin splints or a severe sprain, or has suffered some other type of foot or leg injury. The goal of the walking boot is to add stability to your foot as you move. Walking boots protect broken bones and other injuries of the lower leg, ankle, or foot. They prevent more damage and help the area heal. Your doctor may have you use a boot for 1 to 6 weeks. How long you wear it depends on how serious your injury is