From the top of the hill a 9 lb round of Double Gloucester cheese is rolled, and competitors start racing down the hill after it.[4] The first person over the finish line at the bottom of the hill wins the cheese. In theory, competitors are aiming to catch the cheese; however, it has around a one-second head start and can reach speeds up to 70 mph (112 km/h),[4] enough to knock over and injure a spectator. In the 2013 competition, a foam replica replaced the actual cheese for reasons of safety.[2] The winner was given the prize after the competition.