Leather Upper- Leather straps wraps around the heel for increased support. Synthetic Cross-Over Straps- Comfortable and secure fit that doesn't compromise on style. Velcro Strap- Hassle-free, easy adjustment that provides the optimum, locked-in fit. Microfiber Wrapped Contoured EVA Footbed- Intuitive support with moisture-wicking, quick-drying microfiber wrap. Merrell Air Cushion- Absorbs impact on heel strike to reduce fatigue and increase stability.