- From our Sports Illustrated x Forever 21 collection, this knit bikini top features underwire, high - polish "SI" hardware, adjustable cami straps, and a self - tie back. | Sports Illustrated is a trademark of ABG - SI LLC.©ABG - SI LLC. sportsillustrated. com | Shell: 82% polyester, 18% spandex | Other contents: 92% polyester, 8% spandex | Hand wash cold | Model is 5'9" and wearing a Small | Women's Sports Illustrated Bikini Top in Fiesta, XL