These boots from DeWalt are made from top quality Nubuck waterproof leather with a SYMPATEX membrane which makes the boots breathable for all day comfort. The soles are made from injection moulded PU and TPC which is shock absorbing and heat resistant to 120 degrees C. The steel mid-soles provide protection from sharp objects laying on the floor and steel toe caps can withstand impacts up to 200 joules.The Challengers are also petrol and chemicals resistant and include anti-bacterial insoles.