Designed Diesels "Diesels make you happy, Broke but happy" is the perfect addition to your diesel truck clothing collection. Our high-quality shirt features the business logo. Help supports our veteran-owned company. It's a great gift for anyone who loves Diesel Performance and needs a durable shirt for the jobsite. Available in HighVis colors, with a very unique American flag design you'll be sure to stand out! This shirt is made from 100% polyester that wicks away moisture and dries quickly for a comfortable feel. Plus, the 40+ ultraviolet protection factor will keep your skin safe from harmful UV rays