The Rungne Flash T-Shirt tracks the movement demands of climbing. The climber-cut shoulders open up overhead reach without bunching at the armpit, and the drop-tail hem stays tucked through high steps and heel hooks. It disappears in a pack on the approach and earns its place on warm-weather crag days where a heavy shirt is the last thing needed. What Our Gearhead(R) Experts Are Saying:"I wear this on hot bouldering days because the fabric moves with every reach and dries out between problems instead of staying damp against my skin."