Ranger Flex-Guard Safety Pac 16" Heavy Duty Men's Rubber Metatarsal Boots with Steel Toe and Steel Midsole, Olive/Yellow & Black (2169) 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 Removable FOOT FORM contoured insole and ultra-composite shank provide proper cushioning and arch support to fight foot and leg fatigue; 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; knurled, high-abrasion metatarsal and heel overlays for longer service Built-in metatarsal Flex-Guard floats on top of the foot for increased flexible protection; SAFE-TOE steel toe and SAFE-STEP steel midsole protect against impacts and punctures Self-adjusting top strap for secure fit; ASTM F2413-11 M I/75 C/75 Mt/75 PR and CAN/CSA Z195-05; recommended use: construction, mining, oil & gas, farm & equestrian