Carhartt WIP Nelson SweatCarhartt WIP Nelson Sweat for men. The Nelson Sweatshirt is made from heavyweight, unbrushed cotton jersey with a tactile loopback construction. The item has a balloon fit, which is a little looser and boxier, but also characterized by dropped shoulders and ribbed trims. The style has also been garment dyed for a washed yet saturated hue and softer feel. A woven Square Label, rendered murky by the garment dyeing process, appears on the left chest.