The adidas women’s UltraBoost 21 ‘Hazy Rose’ showcases a monochromatic finish throughout the exterior of the running shoe. The lightweight Primeknit upper, featuring recycled Parley Ocean Plastic and zero virgin polyester, sits atop a full-length Boost midsole with 6% more Boost capsules than previous UltraBoost models. A revised Torsion system, dubbed Linear Energy Push, provides less flex in the forefoot for a more responsive ride.