Amazon.com: Avenger Work Boots mens 7847-m Work Utility 。Men\'s Avenger Framer 400g Composite Toe Waterproof Boots Full-grain leather upper Lightweight composite toe cap meets or exceeds ASTM 2413-17 I / 75 C / 75 standards Removable rebound foam insole for extra comfort Non-metallic Lenzi puncture-resistant plate Non-metallic hardware to meet scratch-resistant workplace requirements Direct attach dual density PU slip and oil-resistant outsole with a .43 Mark II slip rating Waterproof membrane construction 400g Thinsulate insulation CN - CARBON SAFETY TOE: Revolutionary Carbon Nano-fiber material makes these safety toes the lightest and most advanced safety toe available today I / C - IMPACT & COMPRESSION: All footwear exceeds all testing requirements for protective footwear and compression resistance EH - ELECTRICAL HAZARD: Designed to protect the wearer from open electrical circuits up to 18,000 volts MTL - METAL FREE: Designed so no component of the shoe will scratch or mark any working conditions PR - PUNCTURE RESISTANCE: Constructed with midsole designed to reduce hazards of puncture wounds caused by sharp objects penetrating the outsole SR - SLIP RESISTANT: Our Slip Resistant soles have tread designs which channel water, oil and other slippery substance to create superior grip WP - WATER PROOF: Constructed to keep your foot dry from the outside in wet conditions so you are comfortable in your everyday work IN - INSULATED: Designed to keep your feet warm and comfortable no matter what the weather or working conditions