Carhartt is a U.S. based clothing company founded in 1889.
In the United States, Carhartt is synonymous with hard wearing rugged durable work clothes, such as shirts, jeans and dungarees whereas in Europe it is a more of a streetwear based brand in line with Stussy and Dickies.
The European arm of the company supports amongst other things artists, musicians and skateboarders. Whilst the American division provides apparel for more traditional American events such as Rodeos and Nascar races.
Visit their web site at Carhartt
Designer Definition (from U.S Department of Labor)