The super soft feeling comes from the specific proportions of the foam, rubber, and air. EVA foam is a common material used in running shoe cushioning, providing softness at a relatively low weight. Blending the foam with extra air ensures that the cushioning stays lightweight, while the added rubber ensures durability.

Similar to how training wheels keep a bike from falling over to one side or the other, GuideRails support reduces excess shin and heel rotation to keep your natural knee motion in a safe range so you can run with more comfort and less pain. This holistic support system allows your body to embrace its natural motion path while limiting excess motion.