The shoe that pioneered CRM, available in Neutral Cushioning "Ride" option as well as a Supportive Cushioning "Guide" with the added security of a second density post. SRC Impact Zone provides Shock Attenuation and sets up the foot for a smooth transition through the gait cycle. HRC XTRA Forefoot Cushioning is our premier forefoot cushioning system that provides smooth toe-off. Dual Density Compression Molded EVA Midsole provides increased shock attenuation, Responsive Cushioning, Stability and Durability. Premium Sockliner for step-in comfort and improved cushioning.