Balances Leg-Length Discrepancies Eases Calf & Achilles’ Strain Helps Relieve Heel Pain Peel Off Layers for Perfect Fit - 1/8" to 3/8" Heel Lift Ends Pain! This soft insert helps relieve a variety of foot, leg, hip and back pains. For people with different leg lengths, they help balance hips and back to correct posture and reduce discomfort. Takes pressure off sore Achilles’ tendon and calf muscles. Also help heel, heel spur and plantar fascia pain. Effective for months.