The Ironbridge IM steel-toe lace-to-toe style now includes a revolutionary, flexible internal metatarsal guard with D30™ technology to provide reliable protection with improved boot weight and flexibility. Technical and safety features: Extra wide fit - 4E Steel toe cap Internal metatarsal guard Slip resistant sole Protects against electrical hazards Rich, water resistant tumbled leather uppers offer exceptional stability and durability The padded collar and tongue Moisture wicking lining Anti-bacterial Smartmask® insole Iconic Dr. Martens classic PVC air-cushioned sole is resistant to oil, fat, petrol and alkali Standard: ASTM F2413-11 MI/75 C/75 MT/75 EH