Forget warming up with two or three bats while on deck. The new Variable Bat Weight from the Derek Jeter Training Center lets you remove or replace weight from four separate velcro pockets. You can increase weight from 5 oz. to 25 oz. to warm up. And between games build arm strength, improve bat speed and build power! Fits all baseball and softball bats and its soft neoprene acts like a bat protector while your bat's in your bag. For ages 6 and up. Available in royal blue or pink. _Derek Jeter Variable Bat Weight