The most comfortable and supportive sports bra you'll own.Elevate your workout wardrobe with the Performance Flex Bra by On, designed to offer medium support with its racerback style. Made from durable polyester, this black sports bra is perfect for fitness and workout sessions, fitting seamlessly into your athleisure collection. Best suited for summer, it enables you to run confidently and comfortably, supporting your every move as you focus on performance. Make a statement this 4th of July and beyond with this solid, sleek addition to your sportswear lineup.