adidas by Stella McCartney Adidas By Stella McCartney - Adidas by Stella McCartney's blue performance cropped top is a striking way to inject colour into your activewear wardrobe. Made from the sportswear label's signature Primeknit jersey, the racerback design is patterned with a green geometric jacquard, with a white and blue rubber logo applique. Wear it with the coordinating leggings to your next yoga class. 85% Polyester, 13% Nylon, 2% Spandex