Chaco Men's OutCross EVO 4 Hiking Shoes features mesh, jacquard webbing, and synthetic leather upper with traditional lace system, gusseted tongue to keep out debris and protective synthetic toe cap and heel with reflective detail. Adjustable jacquard webbing system with TPU heel lock integrated into laces. Nylon shank for stability and durability. Aegis treatment for odor protection. Non-marking EcoTread 25%-recycled rubber compound. Material: Mesh, Synthetic.