Women's Base Layer Tops

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. ...

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

The long sleeve zip up Asciutta is made from a fabric containing Lyocell, a biodegradable and compostable cellulosic fiber created using an environ...

The Kari Traa Smekker Long Sleeve is a lightweight, merino baselayer with a luxurious feel. Panels of Jacquard-knit patterns in different designs c...

The R1® Air Zip-Neck is a lightweight, breathable and quick-drying technical fleece for high-exertion activities in cold conditions. The 100% recyc...

Our ultra-lightweight Intraknit™ fabric utilizes Merino Sport yarns for a softer, cleaner finish. Crafted with Intraknit™ technology, the Women'...

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

Our most breathable, lightweight top for high-output activities, the 125 ZoneKnit™ Energy Wind Long Sleeve T-Shirt features a body-mapped combinati...

The benchmark against which all others are judged, the 200 Oasis Long Sleeve Crewe Ski Stripes features our most versatile merino jersey fabric for...

The benchmark against which all others are judged, the 200 Oasis Long Sleeve Crewe Ski Stripes features our most versatile merino jersey fabric for...

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...

Versatile, durable Polartec® Power Stretch® Pro base layer top for mixed output in cold conditions. Our warmest base layer zip-neck. Polartec® Powe...