The Rungne Flash T-Shirt follows the specific geometry of climbing movement, with shoulders shaped to track a high reach without bunching and a drop-tail hem that stays tucked through a heel hook. The ultralight Dynoknit fabric dries fast enough between burns that it never feels damp against the skin on a long session. What Our Gearhead(R) Experts Are Saying:"I wear this on hot gym days and outdoor bouldering sessions because the climber-cut shoulders never bind when I'm reaching for a high hold. The fabric stretches with the movement instead of pulling across the back."