Belleville 340U.S. Army flight and tanker approved, the Belleville 340 boots inspire confidence and stability. The hot weather boots are constructed with highly breathable, full-grain leather from cowhide and they are meant to provide comfort along with functionality. They feature a Vanguard sole with a thick center cushion that is made from polyurethane and a sturdy Vibram outsole on the outer sole for maximum comfort. The upper is designed to resist water absorption and contains a fabric mixed with Nomex flame and heat retardant materials. The lining is antimicrobial and resists odors. The boots are ideal for desert missions. Whether in the field or in the air, these boots meet the highest standards.