Thin, ultralight running socks made with a technical merino wool blend and no-show height, the Merino Run+ Ultralight Micro is perfect for runs of any length. A reflective stripe on the back helps keep you visible in low-light conditions. Anatomical toe box for unique left and right fit. Achilles support keeps your sock in place. Reinforced heel and toe for durability and strength. Instep support for stability. Seamless toe closure to reduce bulk and prevent blisters. Breathe zone for improved ventilation. Reflective detail at cuff.