Ranger 16" Heavy-Duty Men's Rubber Work Boots with Steel Toe and Steel Midsole, Black & Yellow (2144) Durable, flexible, industrial weight rubber is hand-laid and vulcanized at high heat for 100% waterproof construction; ozone-resistant to prevent cracks and remain flexible in cold weather FOOT FORM contoured insole provides proper cushioning and arch support to fight foot and leg fatigue; removable, washable and replaceable; tough but soft fabric lining for easy on/off Heavy-duty TracTread outsole and heel for improved grip and traction on slippery surfaces and rough terrain SAFE-TOE steel toe protects against impacts; SAFE-STEP steel midsole protects against punctures but is thin enough to flex; ASTM F2413-11 M I/75 C/75 PR and CAN/CSA Z195-05 Recommended use: construction, mining, oil & gas, food processing, farm & equestrian, waste disposal