Rolling in Heat The heat briefly stretches out the fibers of the bat, thus rolling it does not result in any break in. After the bat cools, the fibers contract and return to their original position before being rolled. This process can be repeated several times without harming the bat. Bats can also be treated with hot water or steam. This process is called "suiting up." Suiting up removes the fur from around their faces or bodies. This makes the skin more vulnerable to injury while playing baseball. The fur can then be shaved or cut off completely for younger players. During game play, a batter feels the effects of heat when he enters a heated stadium or arena music festival field. He will often remove his hat to help relieve some of the pressure caused by the high temperatures inside stadiums and arenas. Batter's boxes are usually set up with electric fans that help keep them cool during games played on hot days. For players who stand in one place for an extended period of time, such as pitchers, coaches, and managers, heating blankets are used to reduce muscle cramping and fatigue. These individuals can then move about the field more freely if they feel pain or discomfort while playing. In conclusion, bats can be rolled in heat to stretch out their fibers without breaking them.