The Gridworks moc-toe men's work boots take on freezing, oily, slippery or rough terrain, with cold-formula outsoles built for traction. Waterproof performance and electrical hazard protection infuse these boots with the protection you need. Premium full-grain waterproof leather uppers Soft toe Steel shank Brass hardware Mesh linings with antimicrobial treatment for odor control Goodyear Welt construction Dual-density Dynamic Anti-Fatigue Technology absorbs shock and returns energy to the foot with every step Electrical hazard protection meets ASTM F2412-11, ASTM F2413-11 and ASTM F2892-11 standards All-weather TPU (thermo-plastic urethane) flat wedge-shaped outsoles are oil resistant per SATRA TM63, heat resistant up to 248 degrees Fahrenheit and resist abrasion Weight of a single boot (size 9) is 841 grams, or 1.85 pounds Imported ANTI-FATIGUE TECHNOLOGY A comfort system designed with shock-absorbing, geometrical technology that returns energy back to the foot to deliver all-day support and comfort. WATERPROOF MEMBRANE Delivers maximum waterproof protection and blood-borne pathogen resistance. Meets ASTM F1671-07 safety standards. Our waterproof footwear incorporates a variety of advanced waterproofing materials, treatments and processes. We start with waterproof leathers that are sealed as part of the tanning process; we then either seam-seal the footwear or use an internal waterproof breathable membrane to help feet stay dry. Tongues and zippers treated with durable water resistant coatings utilize integrated gussets, to further deter water entry. WATERPROOF LEATHER Special tanning repels moisture for waterproof protection. ELECTRICAL HAZARD PROTECTION Provides secondary underfoot protection against live electrical circuits, electrically energized conductors, parts or apparatus. Meets ASTM F2412-11, ASTM F2413-11 and ASTM F2892-11 standards. ANTIMICROBIAL ODOR CONTROL Antimicrobial treatment to prevent and control odors.