Carhartt Men's Force 3" Oxford Nano Composite Toe Cma3421 Industrial Boot Size:10 Wide Color: Black Mesh & Synthetic Nano Composite Safety Toe. Identifies protection against impact and compression hazards with a Carbon Nano (non-metallic) safety toe. Nano Composite safety toes meet ASTM F2413-18 standards. Rubber Heel Bumper. The rubber heel bumper feature is designed to provide extra abrasion resistant durability. Rubber Toe Bumper. The rubber toe bumper feature is designed to provide extra abrasion resistant durability. Static Dissipative. SD shoes reduce the risk of static shock to people and to the manufactured product in the workplace. Meets the ASTM F2413-18 SD35 standards. Insite Technology Footbed. Carhartt footbed made with Insite technology is engineered to create maximum arch support to reduce foot fatigue during long days on the job. Bin:W