Designed and built by 509 with performance and features we require to spend all day wrenching, maintaining our rigs, or supporting our teams in the pits at events. Also a great shop and event shirt to meet and greet customers and inspire them with professional confidence. The Step Up shirt uses a lightweight and very breathable stretch woven material. Unique design styling, plastic snaps for easy on, easy off, and a zippered chest pocket. A small slot for a pen so you can record those lap times.