G3688 Miner Boots Men's Size 7 Closure Type Quick-Release Gusset Toe Type Steel Metatarsal Guard Yes Shank Material Steel Height 16 In. Black Upper Material Ozone-Treated Rubber Midsole Material Polyurethane Outsole Material Dense Rubber Footwear Sole Pattern Cleat Resists Acids Alcohols Bases and Diluted Water Solutions of Most Chemicals that are Water Soluble Standards ASTM F2413-05 M/I/75/C/75 Mt 75 PR EH 1 Pair