Product Story: What Does The X Stand For In Rs-X? Extreme Perhaps? Exciting? All Of The Above? This Thrice-Exaggerated Form Came From A Process Of Stripping Away Everything From The Original Rs And Building It Back Up With A Stronger Mix Of Materials And A Design Inspired By Puzzles With Layers And Layers Of Colours And Textures.Details Low Boot Mesh Upper Pu Midsole Rubber Outsole Rs-X Logo And Puma Cat Logo In Contrasting White On Tongue Label Embossed Puma Cat Logo And Running System On Sole