A fitness bra, also known as a sports bra, is a supportive undergarment designed for physical activities and workouts. It is typically made from moisture-wicking, stretchable fabrics like polyester, spandex, or nylon to ensure comfort and breathability. The design features wide straps, a snug fit, and underwire or compression support to minimize movement and provide stability, especially for high-impact exercises like running or jumping. Available in various styles (e.g., racerback, strapless), it often includes padded cups and adjustable closures. Fitness bras cater to different support levels and are essential for reducing strain during exercise.