Structurally reinforced teflon slides faster while providing increased stability and lighter weight. The Velcro-based slider and gripper system allows you to select the sliding speed you want. Momentum shoes can be configured for either right-handed or left-handed play.Available in either 5/32" (Speed 8) or 1/4" (Speed 11).Sizes cover both full and half sizes.For example, a size 7/8 would fit four sizes of shoes: 7, 7.5, 8 and 8.5.