STRUT-THIS Piper Sports Bra in White. - size S (also in M) STRUT-THIS Piper Sports Bra in White. - size S (also in M) 82% poly 18% spandex. Unpadded. Elasticized hem. Ribbed fabric. Made in USA. STRR-WI19. PIPER. Started by two mother and daughter teams in 2011, Strut-This is a brand whose mission is to empower women of all ages to feel confident and be stylish while working out. Their quality active wear transitions effortlessly from the gym to brunch and everywhere in between.