Well, the Serenity Pants were at the crags long before they were at the studio. Conceived on the shores of Tenaya Lake by Patagonia's original gang of climbing ambassadors, Serenity Pants have endured a decade of Tuolumne granite, Wingate sandstone and Smith Rock welded tuff. The organic cotton/spandex knit stretches yet holds its shape. The versatile, wide waistband is comfortable under a harness but can be folded over and worn at the hips. These organic cotton/spandex pants move with you through poses, workouts or climbs. 9.4-oz 89% organic cotton/11% spandex knit; Fair Trade Certified sewing Some say you can't climb in yoga clothes. 32" inseam.