Features of the Carhartt Men's 6 Inch Rugged Flex Puncture Resistant Waterproof CSA Work Boot - Composite Toe Composite safety toe. Identifies protection against impact and compression hazards with a composite (non-metallic) safety toe. Composite toes meet CSA grade 1 ST, PR electrical shock and ASTM 2413-18 PR, EH 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 Puncture resistant and CSA. Identifies protection against puncture hazards to the bottom of the foot with a puncture resistant plate. Puncture resistant styles must meet ASTM F2413-18 PR standards. CSA grade 1 toe protection and CSA electrical shock resistance of 18KV under dry conditions 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 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 Rubber toe bumper. The rubber toe bumper feature is designed to provide extra abrasion resistant durability Fastdry Technology lining. Fastdry lining wicks away sweat for comfort Cushion comfort insole. Carhartt PU with foam cushion insole provides comfortable support and reduces foot fatigue EVA Midsole with PU strobel pad Cement constructed with carhartt rubber rugged flex Outsole