Men & Women layering smartool base layers by lake


How to Layer Merino Wool Clothing


The best adventures start with the right merino wool base layers. You never know what the weather has in store, and the longer you’re out the more the temperature can change.

That’s why we create layers that work together as a system so your body can breathe better and run more efficiently. From wool underwear to base layers and mid layers, they’re pieces that help retain your body heat when you’re taking it easy and move moisture when you’re on the go.

Activity Tech Graph


MERINO 150 [150 grams]


Single layer for warm weather performance or baselayer for cool weather. Ideal for high intensity workouts.


MERINO 250 [250 grams]


Single layer in cold weather or baselayer for very cold weather. Ideal for stop and go activites.




Works as a breathable system over our baselayers. Our most versatile layer, SmartLoft helps keep you comfortable either as a light outer layer in the chill or midlayer when temps really drop. Proprietary wool insulation helps keep you warm even when wet.