On long trail runs, you've gotta have this tank. The companion to our Hydration Trail Bra, this racerback style is made from our lightweight, breathable, performance-driven EZ Perf Trail fabric. Just when you thought it couldn't get better? It features a low rear neck drop for easy access to the soft flask stored in your Hydration Trail Sports Bra. We love it for: long trail runs and warm-weather race days