Americans are letting go of their old clothes as COVID-19 vaccinations continue, restrictions are eased and offices are reopening. The clothes are going to online resale sites as well as donation centers. The used-clothes marketplace ThredUP paid the research company GlobalData to find information on the movement in used clothing. Projections by GlobalData show the business is expected to double from $36 billion to $77 billion in 2025. James Reinhart leads ThredUP. He said the growth is driven by new sellers putting high quality clothes into the market. He estimates that Americans collectively have at least $9 billion worth of products they do not wear. Buying and selling used clothes was popular before COVID. However, since the pandemic, the movement for buying and selling used clothes has strengthened. Reinhart said shoppers think more about the environment now. He said an increasing number of them seek products that have a good resale value instead of low-cost, low-quality clothes, known as fast fashion. Reinhart said, the change demonstrates a new beliefs set among the clothes-buying public. “It’s not this buy, wear, throw out,” he said, adding that people are much more sensitive to the idea of waste. TheRealReal is a luxury resale site with more than 22 million members. A company report says that the total value of used goods sold this year through May was about $239 million. The report said that number represents a 53 percent increase from the same period in 2019.