Major US department store chains JCPenney and Macy's have both announced they will debut selling used apparel through partnerships with San Francisco-based fashion resale company ThredUp.

JCPenney said that 30 of its stores will start offering a seasonal array of resale handbags and women's fashion from the secondhand apparel company, with the assortment uniquely branded in a 500 to 1,000-square-foot presentation. To keep things fresh, the department store chain said it will be switching up the curated assortment of ThredUp items on a weekly basis.

Macy's said its pilot program would involve 40 stores, offering styles and brands not normally found at Macy's. It's a good use of store space and a good match. However Macy's won't take ThredUp consignments or returns, except for returns of ThredUp merchandise purchased at Macy's stores.

ThredUp has made a name for itself as one of the best-known online outlets for better-quality and premium-brand secondhand clothing. The company allows customers to shop for individual items, as well as order packages of clothing based on preferred styles, brands and sizes. Customers then pay only for the items wish to keep. The company also lets people send in secondhand clothing that it sells on consignment if it meets ThredUp's quality standards.