The JETSPEED FT870 skates are designed to provide a perfect balance of performance, comfort, and durability. Features 2D Metaframe Synthetic Composite Quarter Package: Ergonomic fit, additional stiffness, and support. HD Microfiber Liner with EVA Layer: Delivers fit and comfort deeper into the boot. ADPT Memory Foam Ankle Pads: Creates a comfortable and snug skate interior. 7mm Felt Tongue with Injected Lacebite: Single-layer construction with injected lacebite protection. SpeedBlade XS Holder: Quick runner changes with metal pin bladelock system.