The ALPHAEDGE 4D is highlighted by its 4D midsole which is printed with light and oxygen, using Digital Light Synthesis, a technology pioneered by Carbon. Carbon’s proprietary Digital Light Synthesis is a breakthrough technology that uses digital light projection, oxygen-permeable optics and programmable liquid resins to print high-performance, durable polymeric products. The shoe also comes with a white Primeknit upper with FORGEFIBER. This is a super-lightweight upper that encases your foot in a seamless sock-like fit – providing the support and comfort needed during sharp lateral movements and tight turns. Each thread is individually constructed millimeter by millimeter with FORGEFIBER – a process using TPU-coated yarn, that maximizes performance when stitched at various angles and layers for ultimate strength in motion. Last but not least we have a durable Continental rubber outsole.