The THOR ZX-9 sets new standards for advanced level inline hockey skates by providing comfort without sacrificing stiffness. The ZX-9 is the complete package for advanced level players. Tour has added a new Surlyn material in the quarter package of the skate to make it lighter and also give you an improved level of support. If you have been looking for a skate that will provide you maximum grip and increased speed then the Thor ZX9 is what you have been looking for. They feature the Direct Power System which means all the 80mm wheels have been recessed into the skate which will increase your speed and give you maximum grip all while keeping your center of gravity low. The boot of the skate has a quilted quick wicking comfort liner which will keep your feet dry throughout the entire game and they feature a custom reinforced ankle support. . Skate Type: Roller Hockey, Outsole Material: Carbon graphite outsole-Maximizes energy transfer, Skill Range: Expert - Pro, Model Year: 2012, Product ID: 213241, Ventilation: No, Front Wheel Size: 80mm, Bearing Grade: High Performance, Wheel Durometer: X-Soft, Wheel Type: Indoor Single Durometer, Special Features: Comfort Foam footbed, Closure System: Laces, Maximum Wheel Size: 80mm, Frame Material: Aluminum, Bearing Size: 688 - Micro, Bearing Type: Swiss, Wheel Configuration: 80mm - 80mm - 80mm - 80mm, Wheel Brand: Labeda, Number of Wheels: 4, Lining Material: Quilted quick wicking comfort liner, Tongue: Thin performance mesh tongue with HD foams for protection