To provide a heart protection shirt for ball games, which effectively suppresses development of heart fremitus while minimizing affection on the body movement of a wearer as small as possible when playing the games. 着用時のプレーへの影響を極力小さなものとしながらも、心臓震盪の発症を効果的に抑止できる球技用心臓防護シャツを提供する。 - 特許庁