Wolverine Men's Thunderhead SX Work Boot 100% Textile and Synthetic Imported Synthetic sole Lighter load - it's lighter to reduce strain on your legs and feet all day long. Better fit - a thinner toe cap wall provides more toe room and added comfort. Strong structure - designed to meet astm standards and give protection from dangerous falling objects. EPX anti fatigue footbed - designed to absorb shock and keep your feet feeling comfortable all day long.