PERFORMANCE TECHNOLOGIES: QUARTER Lightweight Core-Flex Quarter construction COMPOSITION Sculptured Air Pressure Molding that hugs the foot and delivers performance. LINER Moisture wicking liner with Reinforced Ankle Support and Deluxe Comfort Padding. TONGUE Anti-Lacebite Comfort Felt Tongue FRAME TOUR(R) Aluminum Powertrack Tri Coil XT 3 BEARINGS NEW Kemistry(TM) Good 5 Bearings WHEELS NEW Kemistry(TM) Niton All Purpose Wheels. Size 5-6 = all 76mm wheels; Sizes 7-12 = all 80mm wheels