Puma | RS-X3 PLAS_TECHThe X stands for extreme. And that's exactly what the X3 is. It goes beyond the expected, takes conventional wisdom and chucks it away.. Semi translucent hot melt overlays on a mesh upper add to the style and make it clear that this is a shoe that definitely lives up the extreme label. Key Features: Color: Available in multiple colors Size: Available in multiple sizes Material: Premium quality material