A compression shirt is a tight-fitting garment made from stretchy, elastic materials like spandex or Lycra, designed to apply gentle pressure to the body. It enhances circulation, reduces muscle vibration, and supports faster recovery during or after physical activity. Compression shirts are commonly worn by athletes to improve performance, reduce fatigue, and aid muscle recovery. They are moisture-wicking and breathable, keeping the skin dry while providing a comfortable, second-skin feel.