With its 19cm cuff height, this is ideal for wearing beneath tights or jeans. Pearl Izumi uses a comfortable combination of fine Merino wool and technical recycled polyester fibers for temperature regulation, with mesh over the instep to increase ventilation. Nylon in the heel and toe increase durability, and a flat seam in the toe to eliminates unnecessary bulk. As its name suggests, this is Pearl Izumi's tallest standard weight sock.