The Apex Ultra Lite shoe features a flexible, breathable mesh knit upper with TPU toe and RDS™ technology for stability and control. TPU has the flexibility of rubber but the durability of plastic and maintains its flexibility in cold weather. Includes entry level 3/32" Teflon® sliding disks, gripper disks, and slip-on gripper. Upgrade your disks by choosing an option from the drop-down menu. This style fits smaller than our usual sizing. Asham recommends that customers go up one size from their regular Asham shoe size.