More energy 6" lace to toe internal met guard boot. Features composite toe, moisture wicking nylon lining, 100% non-metallic airport friendly, removable EVA cushion insert with adiPRENE by adidas®. Shock absorbing heel and rebounding forepart pads. Dual density, direct attached PU midsole and rubber traction bottom with adiPRENE by adidas®. Features Met Guard: A metatarsal guard is an appliance added to footwear, designed to provide additional protection to the instep area. Traditionally used in areas where there is a higher risk of objects falling or rolling onto the instep of the worker's foot.