With its innovative, seamless, 3-D knit structure, the Patagonia Women's Capilene® Air Thermal Bottoms offers amazing warmth and comfort range. An airy blend of 51% merino wool and 49% recycled polyester wicks moisture, resists odor and dries in a flash. With its innovative, seamless, 3-D knit structure, Patagonia's Capilene® Air Bottoms offer amazing warmth and comfort range. An airy blend of 51% RWS-certified merino wool and 49% recycled polyester wicks moisture, resists odor and dries in a flash. All of the virgin wool Patagonia sources is certified to the Responsible Wool Standard (RWS) to help ensure protection both for the animals that supply it and the land they graze. Features and Specifications Fine merino wool from New Zealand blended with Capilene® recycled polyester for enhanced warmth balanced with improved wicking, durability and dry time 18.5-micron-gauge yarn; lofted wool innovation Fabric is soft against skin and stretches to move with the body Seamless 3-D construction eliminates chafe points through the entire garment and has almost no wasted material Elastic waistband is brushed for next-to-skin softness 130 g (4.6 oz) Model is 5'9" and wearing a size Small Materials: 5.6-oz (190-g) 51% merino wool/49% recycled polyester seamless zigzag knit comprised of 18.5-micron-gauge lofted wool Patagonia Women's Capilene Air Merino Blend Thermal Bottoms