The Ortovox Piz Selva Light Short's maximum freedom of movement and nearly weightless feel are perfect for tough climbs and trail runns in warm weather. The spandex and nylon fabric blend stretches easily in all directions to power through challenging routes and problems and it's highly abrasion-resistant to boot able to withstand some meetings with rough granite. For added emphasis on comfort a soft stretchy and moisture-wicking merino wool waistband finishes off the style.