The Rungne Flash Short is cut specifically around the movements that expose a bad short: the heel hook that pulls fabric tight across the hip, the high step that rides everything up. RangeWeave's four-way stretch woven construction keeps the short light and quick-drying without sacrificing the structure that holds it in place through a full session on the wall. What Our Gearhead(R) Experts Are Saying:"The fabric moves with every high step without bunching at the hip. I've worn these through long gym sessions and they stay put the whole time."