Three friends cross-country ski across a powder covered meadow
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Smartwool

Smartwool is more than just soft, warm, itch-free and odor-resistant socks. It’s also clothing, hats and accessories for the whole family. For over 20 years, they’ve been pushing the boundaries of Merino to create smarter, more comfortable gear from head to toe.

4.6 (9804 reviews)

REI offers 370 Smartwool products

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Functional and fun purple Smartwool socks

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Snow-covered mountains in the background, two friends in warm Smartwool clothing kick back on a sunny porch

Happy sheep grow great wool

Smartwool’s merino base layers are made with 100% responsibly sourced, ZQ-certified merino wool. ZQ is a New Zealand program that ensures the highest standards for wool quality, animal welfare and environmental responsibility. Now that's smart.

Staying warm and dry in Smartwool layers while hiking up to snowboard down

Stay warm, and dry, while playing outdoors

Smartwool's thermal-mapped tops and bottoms help regulate body temperature, while quickly moving away sweat from your skin.

Pausing midmountain to enjoy the sunny view during a day on the slopes

Go far and feel good

Core-spun construction is extra durable; thoughtfully designed seams minimize chafing.

Layering up before heading up the hill

Year-round comfort

Choose lighter Merino 150 for high-intensity workouts, or thicker Merino 250 for those colder months.

Kitted out for a day of boarding in Smartwool layers

Benefits beyond the basics

Not only soft and breathable, ZQ-certified merino wool also resists odors. Naturally.

Shop women's & men's base layers