ALL NEW JETSPEED FT850R ROLLERS - HEAT MOLDABLE! BOOT MATERIAL: INJECTED BOOT Ergonomic boot-shaping system for great comfort and new roller texturized fi nish for improved durability. LINER: HD MICROFIBER High resistance to wear with added EVA layer delivering fi t and comfort deeper into the boot. TONGUE: 7MM FELT TONGUE Felt tongue with added foam core for comfort and protection. FOOTBED: CCM FOOTBED Provides support and comfort. CHASSIS: TWO PIECE STEEL HI-LO Two-piece steel frame boasting strength and durability. WHEELS: CCM ROLLER WHEELS Staggered CCM wheel sizes, offering a balance of agility from the smaller wheels and speed from the larger wheels. BEARINGS: ABEC 5 Ideal bearings for recreational and intermediate skaters, offering a good balance of speed, and durability.