The Li-Ning GP 20 Boost is a high-performance overgrip that is sure to compliment your rackets performance. This overgrip is designed to go over the replacement grip or the default factory grip of your racket. It provides you with added comfort and durability for your existing grip and allows you to modify your grip requirements according to playing conditions. Its base material is polyurethane and it ensures that the weight of your racket doesn’t increase.