AliMed Viscoelastic Varus/Valgus Wedges Shock forces are a product of mass (weight) and velocity (speed). If you can slow rebound velocity and alter its direction you can dampen and dissipate shock forces. Computer-generated, bio-mechanically engineered visco-flow control dampens and reduces rebound velocity of heel strike shock waves and redirects them form a vertical to a horizontal position. Combine these premium Varus/Valgus wedges with our Heel Cups (#6425) for a posted shock absorber. Sizing: Large fits Men's 9 to 14