Seasoned, high-performing runners will tell you Merino Wool is essential in their sock lineup, all year long. Here, we’ve mixed runners’ expertise with Bombas sock science for an ultra-lightweight, second skin feel. It’s got mesh ventilation, and is powered by a blend featuring thermoregulating Merino Wool—known to wick sweat, fight odor, and help keep feet from getting too hot or cold, no matter the mileage. We upgraded it even further with comfort features like a Seamless Toe, Targeted Arch Compression, Enhanced Durability, and Stay-Up Tech.