Smartwool and thredUP partnered on a Second Cut Resale program that allows customers to shop secondhand products through and resell gently worn items on for Smartwool shopping credit. 

ThredUP’s Resale-as-a-Service (RaaS) powers the Second Cut Resale program.

To participate, customers can generate a prepaid shipping label at, fill any shippable box or bag with apparel, shoes and accessories from any brand, and ship it to thredUP for free. Sellers who receive Smartwool credit for eligible items that sell in the listing window on the site will earn an extra 15 percent bonus on their payout in a gift card for use on

Smartwool’s resale program powered by thredUP’s RaaS is part of the brand’s broader sustainability initiatives to shift toward a more circular business model. In April, Smartwool released its first circular-designed hike sock made with repurposed yarn from collected socks from the brand’s Second Cut sock takeback program, a year-round initiative it launched in 2021.

Smartwool’s Second Cut project “empowers customers to be a part of the solution to the apparel industry’s textile waste problem by donating their old socks.” Since the launch of the program, Smartwool reported it “has collected 1.07 million consumer socks, equaling around 86,503 pounds of socks diverted from landfills.”