Carhartt 103279 is a classic work trouser that combines Carhartt's well-known heavyweight duck fabric with modern stretch technology. The material is a 12 oz (407 g/m²) duck in 99% cotton and 1% elastane, and the Rugged Flex stretch provides enough freedom of movement to squat or kneel without losing the rugged character that working people expect from a duck trouser.

The trouser has a relaxed fit with ample room in the seat and thighs, and straight legs with a wide leg opening that fits over work boots. It sits slightly below the natural waist, and is equipped with two front pockets, two reinforced back pockets that can handle heavy tools, as well as several tool pockets. Sturdy belt loops are sewn on the seam for extra durability.