Based on our best-selling TOTAL SUPPORT® Replacement Insole, Spenco® GRF Insole for basketball incorporates unique design features to reduce impact forces and return energy; provide support and stability; enhance vertical leaps, and reduce the risk of ankle sprains. Semi-Rigid Arch Support Designed for Basketball Incorporating TOTAL SUPPORT® Technology, our patent pending 3-Pod™ GRF Modulation System and the unique combination of a Forefoot Launch & Crash Pad and First Ray Drop Zone, our GFR Replacement Insoles for basketball not only cushion, stabilize, and support the feet straight out of the box, they also promote a more efficient stride and push-off. It’s The Shape That Feels Great™. Directions: Replace existing insoles. Trim if necessary. Hand wash, air dry.