In 2009, compression socks burst onto the running scene when people witnessed Paula Radcliffe, one of the top female marathon runners, wearing what appeared to be knee-high socks as she ran the Boston Marathon and other major events. In fact, so many people took notice that the sock she wore, 2XU Compression Racing Socks, became the 2009 Product of the Year! Today, the company offers two socks: one worn while running to improve performance, and the other worn after prolonged activities to reduce exercise-induced muscle soreness.