I Wear Your Shirt was an American advertising company that used T-shirts to advertise businesses. From January 1, 2009, I Wear Your Shirt allowed a company to buy a day in which Jason Sadler, the founder, wore a shirt adorned with the company's logo. Sadler wore different shirts for every day of the year. He advertised for the companies by taking pictures and by uploading videos about the companies to Ustream and YouTube. The company closed in 2013.