ASTM F2413: The official standard for safety toe protective footwear in the United States; Composite Toe: A toe cap made from a non-ferrous elastomeric material, which is light weight and will not conduct heat, cold or electricity; XTR Composite Toe Cap: provides extra toe room and comfort; is lightweight, strong as steel and will not conduct heat, cold or electricity; Electrical Hazard (EH): Provides a source of protection from electrical shock in environments where the wearer may accidentally step on a live wire or charged electrical equipment; Slip Resistant: Soles designed to provide a high coefficient of friction with the walking surface to improve slip resistance; Metal Free: Footwear that contains zero metal. It is ideal for jobs that require working around sensitive metal detectors