SmartWool Men's PhD Outdoor Light Micro Socks - Past Season Built for Performance in the Highest Degree, Uses two elastics for greater stretch and recovery to keep the sock in place, Patented ReliaWool technology in high impact areas provides superior durability, The ideal cushion for varied trail and road terrain. Strategically placed mesh ventilation zones provide ventilation for temperature and moisture management Sock Height: Micro, 1.75" overall height Flat knit durable toe seam, Achilles pad Style: SW357