adidas' UltraBOOST 2019 'Refract' Brings a Familiar Feel
Inspired by the and we’ve vibed off in the past, ‘Refract’ takes the best from those colourways and fuses them with the latest running innovations.
The Primeknit upper gets a vibrant rainbow knit pattern, intermeshed with clean white. All the performance upgrades, such as Optimized BOOST, Torsion spring, 3D-printed 360 upper, and a minimalist heel frame, all work together to improve comfort, support and adaptability.