aSMC Ultraboost 23 lower footprint - gobi/semi flash green/purple glowThe Ultraboost is a shoe that lives for progression. This adidas by Stella McCartney version is made with a lower footprint than a previous version. The shoes also ride on a new generation of adidas BOOST our lightest BOOST ever with even more energy return. They also have an adidas PRIMEKNIT upper that wraps the foot with a supportive fit that enhances movement. Wear them for short to medium distance miles in the city.