Forever 21+ - from our sports illustrated x forever 21 collection, this knit pair of string bikini bottoms features an allover geo print with "si" accents and self - tie side closures with high - polish "si" charms. . Sports illustrated is a trademark of abg - si llc. ©abg - si llc. Sportsillustrated. Com. Shell: 82% polyester, 18% spandex. Lining: 92% polyester, 8% spandex. Hand wash cold. Model is 5'9" and wearing a size 1x. Women's sports illustrated geo print bikini bottoms in auburn/walnut, 3x