Injected with Composite Skin: Durable boot with structural stiffness. Heavy Duty Micro-Fiber: Comfortable and high resistance to wear. Felt Tongue: 7mm felt with reinforcement layers for increased comfort and protection. Injected Outsole: Helps energy transfer with every stride. CCM Footbed: Provides support and comfort. Speedblade Pro: Non replaceable stainless steel blade with elevated holder for increased attack angle.