Ultraboost 2021 "Triple White" sneakers Debuted in 2021, Adidas’ Ultraboost 21 sneakers prove themselves more than a functional running shoe. While comfort is maintained thanks to a breathable Primeknit upper, the style remains recognisable thanks to the label’s iconic three stripe logo, seen to the sides.  Imported Composition Sole: Rubber 100% Outer: Fabric 100%, Thermoplastic Polyurethane (TPU) 100% Lining: Fabric 100%