adidas by Stella McCartney Adidas By Stella McCartney - Streamline your workout edit with Adidas by Stella McCartney's black running cap. It's crafted from breathable recycled technical jersey that effectively wicks sweat and features a brim accented with a reflective logo. Wear it teamed with the collaboration's coordinating separates for mid-week workouts. 100% POLYAMIDE+VISOR: 90% POLYESTER, 10% ELASTANE