Why do you run? We run to clear our heads, to reconnect, to release. Whatever your reason is, these adidas by Stella McCartney Ultraboost 22 Shoes help you stay in that flow without distractions. The Linear Energy Push system brings a 15% increase in forefoot bending stiffness to create a more responsive stride. Pairing that with plush Boost cushioning means every step is supported with incredible energy return and unparalleled comfort. Which is essential when you're putting in those miles. To reduce our reliance on virgin materials, we make sure that our vegan alternatives also contain a minimum of 25% recycled content.