Flexible knit upper is lightweight and breathable Supportive overlays at the midfoot and heel Low profile silhouette for a classic look Lace-up construction for a snug fit Boost cushioning for elevated comfort Built for performance and boasting plenty of classic streetwear vibes, the adidas Ultraboost 21 are your go-to choice for those days when comfort and style can't be compromised. Experience functionality like never before thanks to the energy-returning Boost midsole that brings comfort with each and every step. Product Code: S23876