:Designed Diesels (Blue-Collar Support) is the perfect addition to your diesel truck clothing collection. Our high-quality shirt features the business logo. Help support 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, this shirt is made from fabric blends: 60% polyester, 40% cotton that wicks away moisture and dries quickly for a comfortable feel.