Zoot's Performance Tri Full Zip Men's Tank Top blends careful, tri-specific construction with advanced fabrics to give you the support you need on race day. Cut from Zoot's Performance Endura fabric, this tank supports your muscles to help slow fatigue as you transition through swimming, biking and running, while continuously pulling moisture away from your skin and drying quickly. Zoot employs a slim, contoured fit with a slightly elongated back hem on the jersey so that you don't have any unnecessary fabric slowing you down, and the fabric boasts a 50+ UPF rating to help protect your skin from strong summer rays. While you race from early morning to midday, a full-length zipper helps you deal with temperature changes by allowing you to customize ventilation, while two roomy rear pockets give you ample space to store your favorite mid-race energy chew or gels. As it does on most of its tri line, Zoot uses its SeamLink construction on the Performance Tri Tank, which keeps the seams flat to prevent chafing while adding mechanical stretch to ensure that there aren't any spots along the jersey that could compromise your mobility.