The Explore sock is built with 3-ply terry loop construction for maximum impact protection and super fast wicking to keep your feet dry and comfortable. The Explore is slightly heavier than the Conquer. The top of the foot is constructed to help with temperature control. Reinforced heel and toe with arch support. Silver infused alpaca for odor free wear. This sock is offered in a 6" Crew and Micro. The ALTERA Alpaca Explore is the perfect do everything sock.