4 spike configuration for traction and optimum efficiency

No matter how much you are on the move during the day

From 5k to marathon

The Flyvent waistband provides lightweight ventilation for exceptional comfort

Swiftwick Pursuit Ultra Light Sock Seven (Crew) Size:Extra Large (Men US 12.5-15) 4 spike configuration for tractionSwiftwick Pursuit Ultra Light is designed as an all season sock suitable for any adventure. The addition of Swiftwicks signature Olefin fibre to the proven outdoor performance of Merino Wool makes it the driest sock in its class. Lightweight Olefin wicks moisture and dries quickly, while the unique structure of Merino Wool absorbs moisture without feeling soggy or losing the ability to regulate temperature. It also includes a reinforced heel and toe