United Colors of Benetton Men's Cotton Trunk Check out our Undercolors Practical and solid colorful trunks. Classic models to those and choose comfort with our trunks for men. From the classic solid color models with jacquard elastic to those in patterned stretch cotton: choose comfort with our boxers. Classic in long fiber stretch cotton, with clashing elastic or with colorful prints: check out our collection of briefs for men here.