CMF8058 - Carhartt Men。*Composite Safety Toe. Identifies protection against impact and compression hazards with a composite (non-metallic) safety toe. Composite toes meet ASTM F2413-18 standards. *Electrical Hazard (Safety Toe). Identifies secondary protection against incidental contact with electrical circuits of 18,000 volts or less under dry conditions. Safety Toe EH styles meet ASTM F2413-18 EH standards. *Insulation (400gm 3M Thinsulate) These shoes are designed to keep your feet warm in most types of cold conditions. 3M Thinsulate is a microfiber that insulates boots by trapping air molecules between you and the outside. 400 grams is used for cold conditions or moderate activity levels. *Storm Defender Waterproof Breathable Protection. These shoes are designed to be completely waterproof and to keep your feet dry in most types of wet conditions. A waterproof and breathable membrane is used to keep your feet dry but promote air flow and circulation. *Cushion Comfort Insole. Carhartt PU with Foam cushion insole provides comfortable support and reduces foot fatigue.