New Balance Harmony Racerback Bra combines a supportive, racerback design with stretch double-knit fabric for comfortable everyday wear. It’s designed to deliver a close, supportive fit during low- to medium-impact activities. Key attributes: Black | Polyester | Stretch fabric for comfort | Supportive | Form-fitting silhouette | Racerback | Dimensions & fit: Form-fitting silhouette designed to feel snug against the body | Composition & care: 78% polyester, 22% spandex | Machine wash cold, tumble dry low.