ThredUP is an online consignment and thrift store that specializes in secondhand clothing. Founded in 2009, it allows users to buy and sell gently used apparel, primarily for women and children. The platform promotes sustainable fashion by encouraging the reuse of clothing, reducing waste, and minimizing the environmental impact of the fashion industry. Users can send their unwanted clothes to ThredUP in a prepaid shipping bag, where the items are inspected and listed for sale. Shoppers can browse a wide selection of brands at discounted prices, making it an affordable option for those looking to refresh their wardrobe while being eco-conscious.