The light and comfortable Geox Nebula Sneaker D621EC is ideal for everyday wear. Elastic laces offer a secure fit and metallic inserts featuring the Geox logo enhance style. This pair is highly breathable with its combination of the Net Breathing System and Inner Breathing System. Maximum flexibility, stability, and comfort come from the 3D Performance Unit sole. With a special lining and a full grain leather insole, this pair ensures temperature regulation and moisture resistance. 3D Performance Unit Full Grain Leather Insole Rubber Sole Net Breathing System and Inner Breathing System.