Specifically designed for the female foot, Adidas by Stella McCartney's Pure Boost X canary-yellow and slate-grey knitted trainers have a light, close-fitting sock-effect with supportive floating arches. BoostTM responsive cushioning helps you maintain an even pace by returning energy with every step, and the Stretchweb rubber outsole flexes and adapts to your foot strike. Slip them on to make running feel effortless. COMPOSITION: Knitted mesh. Canary-yellow and slate-grey speckled knit. Round toe, sock-effect close fitting slip on. Slate-grey front toe-cap, slate-grey heel cage. Canary-yellow ankle band. Canary-yellow and slate-grey mesh front panel. Black grosgrain heel pull tab, white logo-print. White Boost midsole and canary-yellow Stretchweb rubber sole. Slip on. Fits true to UK sizing.