Backside of man in flannel shirt and rubber boots walking down a boat ramp onto a dock.


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

4.6 (7134 reviews)

REI offers 433 Smartwool products

Fits like a glove, only it’s a sock.

Smartwool wraps you in comfort, warmth and style, so you’re always ready to head out with your crew.

Man and woman cross country skiing up snow-covered mountain with their backs facing the camera

Two types of cool

Smartwool’s Merino 150 is ideal for high-intensity workouts in cool weather whereas their 250 is best for stop-and-go activities in very cold weather.

Outfit yourself intelligently


Their most versatile layer, SmartLoft helps keep you warm even when wet as a light outer layer or midlayer when temps really drop.


Stretch, warmth and mesh panels for breathability make Smartwool’s PhD® Light fabric a superior choice for tackling moisture.

About Smartwool

Once upon a time, frustrated by cold feet and the drawbacks of old-school wool, two New England instructors teamed up to create a new breed of wool footwear that would be warm, itch-free and easy to clean. Smartwool socks were born, and with them the company's advancing campaign for comfortable feet. Today, Smartwool specializes in not only socks, but gloves, hats and sweaters, too, plus base layers made from the finest merino wool for clothing that's soft, comfortable, versatile, and odor-resistant so the whole family can stay warm and happy for any outdoor activity.