The Women's Patagonia Long-Sleeved Capilene Cool Lightweight Shirt is a slim-fit performance layer made with fast-drying, moisture-wicking fabric and treated with HeiQ Mint odor control to stay fresh, featuring a long-sleeved scoop neck design with set-in sleeves for better movement, a slight drop tail to keep it in place during activity, and side vents at the hem for added mobility.