Smartwool® PhD® Outdoor Light Socks are packed with high-performance features that go toe-to-toe with your biggest adventures. These socks fit like a super-supportive hug – no slipping, bunching or bagging. The soft merino wool blend naturally wicks away moisture, regulates temperature, stymies odor and even thwarts blisters! Ultra-durable construction, a chafe-free toe seam and built-in mesh ventilation zones add more un-de-feet-able comfort for miles to come