Standing the test of time, Colorado is the epitome of a classic boot. It's no fuss and no frills - just timeless design, hardworking traction, and boundless resilience. The Colorado from Caterpillar features a black nubuck upper, textile lining and a notched rubber outsole. It is both robust and comfortable. Full-grain leather and padded upper collar Durable rubber outsole for traction Soft EVA foam footbed for longwearing comfort