adidas by Stella McCartney Hybrid Short in Black. - size S (also in M) adidas by Stella McCartney Hybrid Short in Black. - size S (also in M) 78% polyamide 22% elastane. Banded waist. Back zipper pocket. Stretch fabric and fit. Imported. ADID-WF30. EA2193. 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.