For dark-o'clock starts, you need technical insulation that keeps you dry when you're working and warm once the action slows down. The micro-grid fleece interior of our Capilene™ Thermal Weight provides the greatest warmth combined with the greatest breathability of any baselayer in our lineup. Soft, stretchy and compressible, the 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. Capilene™ Thermal Weight has 30-92% recycled content and is treated with Polygiene™ permanent odor control. Features include a flat waistband with brushed inner elastic for next-to-skin softness, a gusseted crotch for mobility and flatlock seams to minimize chafing.