Some things never go out of style, like the Duncan boot. With Cat Footwear tested outsoles and full grain leather upper, this boot is a great mix of style and function. This type of boot is something every man should own, and will stand the test of time with its long-lasting durability. The Duncan is proof you can never go wrong with a Cat Footwear classic. Pull up leather upper, Nylon mesh lining, Removable EVA Sock Liner, Strobel Construction, Rubber outsole.