Solid baselayers are a dime a dozen, but the Showers Pass Long-Sleeve Body-Mapped Men's Base Layer is a little more than solid. It's designed to be worn under Showers Pass jackets, with open-knit venting at the center back and underarms that works in concert with the vents in most Showers Pass outerwear to keep you dry and comfortable. It's made from a blend of merino wool, modal, spandex, and nylon to create a fabric that's naturally soft, antimicrobial, durable, stretchy, and breathable. The close-to-skin fit improves moisture transfer, and the seamless construction prevents chafing. Showers Pass also endows this baselayer with a long cut for full on-bike coverage, a wide hem to prevent it from riding up, and thumbhole cuffs to seal out drafts and moisture.