Women's Base Layer Long sleeve tops

A warm merino base layer top with a unique jacquard pattern, the Merino 260 Vertex Long Sleeve Half Zip Delta Lines AOP is a go-to piece for winter layering—ideal for skiing, snowshoeing and other cold-weather pursuits. The all-over pattern draws inspiration from the natural lines and flowing forms of a...

A heavyweight merino wool base layer top designed to help regulate temperature during high-intensity activity, the 260 ZoneKnit™ Long Sleeve Crewe features 100% and natural merino wool.

A heavyweight merino wool base layer top designed to help regulate temperature during high-intensity activity, the 260 ZoneKnit™ Long Sleeve Half Zip feature 100% and natural merino wool.

A heavyweight merino wool base layer top designed to help regulate temperature during high-intensity activity, the 260 ZoneKnit™ Long Sleeve Crewe features 100% and natural merino wool.

A heavyweight merino wool base layer top designed to help regulate temperature during high-intensity activity, the 260 ZoneKnit™ Long Sleeve Half Zip feature 100% and natural merino wool.

Comfortable base layer top that feels like a second skin thanks to its slim-fit seamless design and highly breathable merino-blend fabric, the Merino Blend 260 ZoneKnit™ Seamless Long Sleeve Crew features body-mapped mesh panels for added ventilation.

The lightest, most breathable baselayer we've ever made, with Cool-Lite™ eyelet fabric that dries quickly and helps keep you cool, the Merino Blend 75 Cool-Lite™ Featherlight™Tank provides versatile, all-season performance.Slim Fit – Tailored performance fit, shorter in length. Size up for regular fit.