Composite Skin: Durable boot with structural stiffness. Heavy Duty Micro-Fiber with Durazone Abrasion Protection: Comfortable and high resistance to wear. Felt Tongue with Embossedlace-Bite Protection: 7mm felt with reinforcement layers for increased comfort and protection. Iinjected Outsole with Exhaust System: Helps energy transfer with every stride. CCM Anatomical Response: Provides support and comfort. Speedblade 4.0: Proven durability with increased attack angle providing greater strides and cornering. Speedblade Stainless Steel: Provides a long lasting edge for long term performance.