The Castelli Unlimited 18″ Socks are designed for endurance, offering comfort and durability for long rides, whether on a Gran Fondo, bike packing, or gravel adventures. They feature a PiquE construction for breathability and a double knit technique for ankle protection. Q Skin Yarns with antimicrobial silver help reduce foot odor. These socks also include a midfoot support band and reinforced heel and toe for added support and comfort during extended rides. Ideal for those who demand top performance and durability. SKU: UNLIMITED18SOCKCOBALTBLUE.