adidas by Stella McCartney Primeknit® fabric sneaker with rubber trim. 1. 3" flat heel; 0. 5" platform. Reinforced round toe. Lace-up vamp with pull-tab. Reinforced heel counters. Padded footbed. STRETCHWEB rubber outsole flexes to adapt to the way your foot hits the ground; provides extraordinary grip in wet and dry conditions. "Ultra Boost" is imported.