Specially designed to improve foot posture and relieve stress on your ankles, knees, hip and lower back. Excellent for all sports activities - running, walking, hiking, standing and high impact sports. The insole has a deep-cushioned heel cup with sides contoured to the shape of the foot and supported by the nylon shell. The arch support stabilizers and supports the arch area to help hold the foot in its natural alignment and prevent the arch from falling. The firmness of the contoured nylon shell helps the arch support accomplish these special features. The insole has a comfortable and healthy polyester top covering. The fabric ""breathes"" circulating air throughout the shoe to ventilate the foot with each step. The polyester fabric is odor inhibiting, anti-bacterial, and anti-fungal. The fabric's porous fibers wick away sweat for better foot health and comfort.