Every single item we make, from lifestyle socks to our most technical baselayers comes with our 100% Satisfaction Guarantee.

The Smartwool Promise

We stand behind everything we make. We promise to make our products with incredible attention to comfort, fit, and durability—because we want you to love our gear as much as we do.

And we want them to be able to support all of your adventures, from exploring new cities to summiting new mountains. So, if for any reason, you aren’t completely happy with your Smartwool gear within 3 years of purchasing, we’ll take it back. No problem.

Just fill out the Smartwool guarantee form below, send in your product, and we’ll contact you with next steps. We want you to get back to running, skiing, and playing in the outdoors as soon as possible.

The Smartwool warranty department will assess each item sent in and replace it with a comparable item based on style, functionality, and price. Please allow four-six weeks for processing.

Smartwool Guarantee Form

Have an unworn item that you want to return? Get instructions here.

United States Smartwool Guarantee Information:

Mailing address for guarantee form and product:
Attn.: Guarantee Department
3495 Airport Circle
Steamboat Springs, CO 80487

Email us at:
Or give us a call at 888-879-9665

U.S. customer service hours:
Monday–Friday, 8:00 a.m. – 4:30 p.m. CST

Canada Smartwool Guarantee Information:

An authorization number is required for all Canadian Guarantee claims. To receive your authorization number, please contact our Canada Smartwool Warranty Team at 1-844-768-9665 or email

Warranty department hours:
Monday–Friday, 8:30 a.m. – 6:00 p.m. EST

Mailing Address:
Smartwool Canada
3260 Rue Guennete
Saint-Laurent, QC
H45 2G5