Construction Breathable polyester mesh upper with TEK2.5® waterproof membrane to keep feet dry. Lace-up style for a custom fit (laces not waterproof). Nylex lining. Cushioned EVA midsole and removable EVA footbed provide noticeable comfort, right out of the box. Heel and toe bumpers add durability. Trail Trac rubber outsole features a versatile lug pattern for traction on a variety of surfaces.