Running like on clouds. With a slight heel increase. Metal-free safety. Ultralight & durable. Upper made of nappa/lacquered leather. Interior: Breathable ON STEAM® inner lining. Safety equipment: Toe protection Light metalcap, penetration protection Flex metal-free. PU/PU cushioning core outsole. Burberry-style Comfort ON Steam All-Sole Insole. Resistant to oil and petrol, antistatic. Heat resistant up to approx. 120.