Lightweight and a great fit, making them easy to walk in. Outer Material: Synthetic Leather/Mesh Closure Type: Bungee Water Resistance Level: Non-Waterproof These shoes use both synthetic leather and mesh uppers for lightness, keeping your feet cool in the summer. The midsole uses Merrell's exclusive ultra-lightweight "FLOATPRO" midsole, which combines cushioning and durability for excellent comfort.