adidas by Stella McCartney Performance Essentials Tank in White. - size M (also in ) adidas by Stella McCartney Performance Essentials Tank in White. - size M (also in ) 65% recycled polyamide 35% spandex. Contrast mesh fabric accents. Imported. ADID-WS85. CF4154. Adidas by Stella McCartney offers women cutting age sports performance clothing they can work out in while still feeling good about the way they look. Not compromising style for performance, the balance is struck between fashion and sport.