The Del Mar features a BareFit internal liner with open mesh upper provides comfort and exceptional fit, with a no sew construction provides added support to the foot, with a Z-Bound insole for added internal comfort and durability. Z-Bound ensures exceptional shock absorption and responsive ride, with constant ground contact for a smooth, quiet ride. ZCR in the heel offers brilliant durability and the full ZBR forefoot provides the plushest ride with maximum durability.