CEBU Men's Comfort 10&rdquo; Work Boot EXCLUSIVE DOUBLE DENSITY POLYURETHANE AND RUBBER DESIGN-The flat sole design increases both comfort and durability. Absorbs the impulses and shocks of machinery and other sources AIR FLOW REMOVABLE INSOLE- Have stinky feet? No worries! Our removable insoles will do just fine in the washing machine and come out looking and smelling fresh. The design also allows for some air flow. The special LIGHTWEIGHT sole does not hold mud, which makes this sole perfect for landscaping, drivers, or similar applications. Although water resistant, these boots are NOT waterproof Oil, Gas, and Acid Resistant; Goodyear Welt Construction. The external part of the shoe is made up of 100% GENUINE LEATHER.