ENGINEERED MESH UPPER Multi-directional mesh material improves ventilation and stability. GUIDESOLE TECHNOLOGY The curved sole design and stiff forefoot of our GUIDESOLE technology reduce ankle flexion and provide a shock-absorbent landing zone to lessen fatigue of other leg muscles and increase runner efficiency. FLYTEFOAM PROPEL TECHNOLOGY ASICS energetic foam formulation that provides supreme bounce thanks to a unique elastomer compound. SURFACE Road HEEL DROP 5 mm WEIGHT 249 g/8.8 oz SUPPORT Neutral CUSHION Extra UNDERPRONATION IS How Your Foot Contacts The Ground: The outside of the heel hits the ground at an increased angle with minimal pronation, causing shock to the lower leg. Push-Off: You experience pressure on your outer toes. Considered Injuries: Plantar fasciitis, shin splints, ankle strain. Foot Type: High arches. NEUTRAL FOOT TYPE IS How Your Foot Contacts The Ground: Your foot lands on the outside of the heel and then rolls inward, absorbing impact on the body. Push-Off: Your experience even distribution from the front of the foot. Considered Injuries: Getting hurt is less likely due to effective shock absorption, but not impossible. Foot Type: Normal-size arches. OVERPRONATION IS How Your Foot Contacts The Ground: Your foot lands on the outside of the heel and then rolls inward, transferring excess weight. Push-Off: Your experience pressure mainly on your big toe and second toe. Considered Injuries: Shin splints, plantar fasciitis, bunions, heel spurs. Foot Type: Low arches or flat feet.