STRUT-THIS Piper Sports Bra in Red. - size S (also in XS) STRUT-THIS Piper Sports Bra in Red. - size S (also in XS) 76% poly 24% spandex. Unpadded. Sweat-wicking fabric. Quick-drying. Made in USA. STRR-WI15. 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.