Caterpillar Men's Mortar 6" Boot. A Rugged Leather Work Boot That Also Looks Great With A Pair Of Jeans In The Urban Jungle. Sturdy Construction With Surround Comfort For A Super Fit And Feel. Take It To Work Or Take It Downtown, It Can Handle Both. • Oiled Full Grain Leather Upper • Speed-hook And D-ring Lacing System • Padded Collar And Tongue • Back Pull-loop For Easy On • Nylon Mesh Lining • Molded Eva Cushion Insole • Steel Shank • Goodyear Welt Construction • Slip-resistant T280 Rubber Outsole With Traction Lug Pattern