The Extreme Hockey Slide Board Pro targets the specific muscles needed to help you maximize the power of your stride. It will help you with your lateral movements, balance and endurance so you can be first to the puck every time. Used by 100+ NHL players. Comes with 3 pair of Slide Board Booties so everyone in the family can work out; Small (up to size 5), Medium (size 5 to 8) and Large (size 8 to 12).