EVENup Shoe Lift Can be used for the left and right foot. Compensates leg length changes while wearing a fracture boot or a below knee cast. Advantage adjustable height offers 1/3? or 2/3? or 1? lift avoid uneven gait helps to prevent back hip and knee pain.EVENup ? can help! Leg length inequality is a common complaint after hip replacement surgery. While surgeons try to leave patients with an equal leg length there are times when leg lengths may turn out to be different after hip replacement surgery. This discrepancy can lead to back pain and discomfort. The good news is that the EVENup? shoe lift can easily remedy this situation without the need for costly orthopedic shoes.