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; Foot Force F2A Athletic Footbed: Removable, polyurethane cushion insole provides all-day comfort, shock absorption, and support; 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; Side Zip: Quick-access side zipper for easy on and off; Airport Friendly: Footwear that contains minimal metal hardware and will not activate most airport metal scanning devices