Zoot Performance Tri Tank. Zoot's most popular triathlon tank is back and better than ever. The Performance Tri Tank combines enhanced breathability, next to skin comfort, and essential protection from the sun. Its Performance Endura fabric construction ensures you're dry and comfortable from start to finish while the mesh panels on the back and 10 zipper are flat out awesome on warmer days. The dropped back hem is perfect for cycling and the back pockets mean you've got your favorite nutrition products readily at hand to fuel your workout.