Newton BOCO All Terrain II Running Shoes Synthetic-and-mesh Closed-mesh upper - Blocks out dirt and debris. Laser-perforated synthetic suede saddle - For a midfoot-conforming fit. Gusseted tongue - Keeps debris from entering the shoe. Anatomical metatarsal stretch panels - Adapts to a variety of foot shapes and widths. Heel lace lock - To prevent heel slippage within the shoe.