adidas by Stella McCartney Track Jacket in Grey. - size XS (also in S,M) adidas by Stella McCartney Track Jacket in Grey. - size XS (also in S,M) 56% poly 44% recycled poly. Partial front zipper closure with perforated gusset. Side zipper pockets. Drawcord hem. Funnel neck with back drawcord. Elastic cuffs. Imported. ADID-WO59. FK9676. 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.