prAna Mission Trails Tank -- prAna's Mission Trails active tops offer unrivaled comfort, breathability, and durability. They’re ethically-made too, which means you get to support the planet and its people while perfecting your practice. The Mission Trails Tank is the definition of active style. With a crew neck, lots of stretch, and built-in side panel for extra comfort as you push your limits, this is an everyday hero when it comes to training.