"What Our Gearhead® Experts Are Saying:""I use this as my go-to base layer when I’m moving hard in cold weather. It wicks incredibly well, never feels clammy, and the grid fabric adds warmth without bulk. The thumb loops and longer hem keep it perfectly in place all day.""When our days demand movement across changing conditions, the Long-Sleeve Capilene Thermal Crew is the layer we trust next to skin. Designed by Patagonia for high-output adventures, it works just as well on a cold hike as it does under a shell for ski days. The fit feels natural and unrestrictive, making it easy to forget we’re even wearing it. Polartec Power Grid fabric lifts the material slightly off the skin to improve airflow and moisture management, keeping us dry as effort levels rise. Stretchy construction moves with the body, while flatlock seams eliminate chafing during long days. With built-in odor control, thumb loops for sleeve security, and a droptail hem for coverage, this base layer stays comfortable from first movement to last stop."