Merino Lightweight Sleeveless Base Layer - Men's

What Our Gearhead® Experts Are Saying:

"I wear this under my race kit for everything from cool morning starts to full sun by the finish. The mesh construction keeps moisture moving so I never feel clammy mid-effort."

Race day conditions rarely stay consistent from start to finish, and the Merino Lightweight Sleeveless Base Layer is built to handle that variability without requiring a kit change. Merino wool fibers regulate body temperature naturally, pulling warmth in during a cool start and releasing it as effort and ambient temperature climb through the race.

The mesh construction maximizes moisture transfer, moving sweat away from skin fast enough to prevent the clammy discomfort that heavier base layers create under sustained effort. Anti-bacterial, itch-free merino means the layer stays comfortable against skin for hours, while its close fit ensures no bunching or chafing under a fitted jersey.

Designed to sit close to the body, this base layer works equally well under a flyweight jersey in summer heat or layered beneath a thermal jacket and jersey combination in cold, making it a practical year-round addition to any race day kit.