Men's Base Layer Tops

An ultralight merino base layer top designed to help regulate body temperature during high-intensity activity, the 125 ZoneKnit™ Short Sleeve Crewe...

A breathable, lofted baselayer to keep you warm in cold conditions. Polartec® Power Grid® fabric with HeiQ® Pure odor control. Polartec® Power Gr...

A breathable, lofted baselayer to keep you warm in cold conditions. Polartec® Power Grid® fabric with HeiQ® Pure odor control. Made in a Fair Trade...

This ultra-soft knit turtleneck top for men offers a stylish look, all while providing protection against the cold. Completely versatile, our turtl...

Midweight merino base layer bottoms designed to help regulate temperature during high-intensity activity, the 200 ZoneKnit™ Leggings feature 100% p...

Ultralight merino base layer bottoms designed to help regulate body temperature during high-intensity activity, the 125 ZoneKnit™ Leggings feature ...

Our best-selling base layer bottoms made from soft and breathable 100% merino wool jersey, the 200 Oasis Leggings With Fly are the perfect foundati...

Midweight base layer bottoms perfect for skiing, winter hiking, or cold-weather layering, the 260 Tech Leggings With Fly are a warmer version of ou...

Our Men's Intraknit™ Thermal Merino Base Layer Crew is anything but ordinary. Super lightweight, ultra-moveable and designed to maximize thermor...

A midweight merino base layer top designed to help regulate temperature during high-intensity activity, the 200 ZoneKnit™ Long Sleeve Crewe feature...

Our Men's Classic Thermal Merino Base Layer 1/4 Zip has an improved fit that takes functionality to the next level. Crafted with 100% responsibl...

Our versatile, go-anywhere shirt made from breathable 100% merino wool jersey, the 200 Oasis Long Sleeve Crewe is our best-selling base layer top.

A warmer, midweight version of our best-selling Oasis, the 260 Tech Long Sleeve Half Zip is a go-to piece for winter layering, made with 100% merin...

An ultralight merino base layer top designed to help regulate body temperature during high-intensity activity, the 125 ZoneKnit™ Long Sleeve Crewe ...