Transform your morning ritual into an eco-conscious triumph. Slip into these Stella McCartney x adidas Ultraboost 21 sneakers and feel the marriage of planetary stewardship with athletic ambition hugging your feet. The engineered mesh embraces your arches like a second skin, while the strategic cage detailing works overtime to stabilize every lateral move. Our revolutionary Boost midsole doesn't just absorb impact - it converts your momentum into spring-loaded energy, mile after mile. Crafted with Primegreen technology, over half the upper breathes new life into recycled materials. Walk tall knowing your footprint literally reduces footprints.