RocketFrame Composite Quarter Package 3D-lasted lightweight composite boot with a pro tapered shape that provides an excellent heel lock for easier speed generation. SpeedCore 1 The skate's lightweight, rigid and thermo-formable core helps generate excellent performance. Liner Heavy-duty micro-fiber with durazone abrasion protection for a comfortable and high-resistance to wear.Stay smooth and comfortable on the ice with a soft padding around the collar of the boot for superior foot and ankle support. Ankle Padding Symmetrical multi-density memory foam comfort pads wrap around the skater's foot for a customized fit and comfort. Tongue The skate features a felt tongue with an embossed lace-bite protector, reinforced with layers for increased comfort and protection. SpeedBlade 4.0 Holder Proven durability with increased attack angle providing greater strides and cornering. SpeedBlade Stainless Steel Provides long-lasting edge for long-term performance.