The Patagonia Women's Capilene Thermal Weight Bottoms is Patagonia's warmest baselayer made with low-bulk Polartec® Power Grid™ fabric with Polygiene® permanent odor control and is Fair Trade Certified™ for sewing. For dark-o’clock starts, you need technical insulation that keeps you dry when moving and warm once the action slows. The micro-grid fleece interior of Patagonia's Capilene® Thermal Weight provides the greatest warmth combined with the greatest breathability of any baselayer in our lineup. Soft, stretchy and compressible, Polartec® Power Grid™ fabric has a smooth face that glides beneath layers and a brushed fleece interior to warm your core, wick moisture and feel smooth against your skin. This fabric also has 30–92% recycled content and is treated with Polygiene® permanent odor control. Features include a brushed elastic waistband for next-to-skin softness, gusseted crotch for mobility; flatlock seams that minimize chafing. Features and Specifications Polartec® Power Grid™ fabric with Polygiene® permanent odor control has a smooth face for easy layering. Fair Trade Certified™ sewing Fabric’s open-grid pattern next to skin provides superior warmth, breathability and moisture-wicking performance Spandex for stretch and ease of movement Flat waistband has brushed inner elastic for next-to-skin softness Gusseted crotch for comfort and unimpeded mobility Flatlock seams minimize chafing 139 g (4.9 oz) Materials: 3.8-oz (129-g) Polartec® Power Grid™ fabric. Solids: 92% recycled polyester/8% spandex; heathers: 92% polyester (30% recycled)/8% spandex; both with Polygiene® permanent odor control. Fair Trade Certified™ sewing. Fabric is certified as bluesign® approved Patagonia Women's Capilene Thermal Weight Bottoms Thermal Underwear