24kPUMP®: The Pump™ technology is the ultimate in personalized pro performance and comfort QUARTER PACKAGE: Synthetic light weight structure for enhanced forward flexion CORE: Non woven reinforcement fibers for support enhancement LINER: Quick Drying dual zone heavy duty Microfiber Liner ensures a comfortable fit with added durability TONGUE: 7mm high density felt tongue with foam insert enhances the fit and comfort OUTSOLE: Low profile injected outsole maximizes energy transfer MIDSOLE: Die cut plastic for a supportive feel FOOTBED: Anatomical Response, comfortable and durable HOLDER: SpeedBlade Pro, taking advantage of the 4 mm to increase the angle of attack RUNNER: Stainless steel runner provides a long lasting edge for long term performance