The Heady Betty Micro Crew Lightweight Sock is the latest offering in Darn Tough's beloved Micro Crew collection, and just like its predecessors, it provides plenty of comfort and durability wherever our feet take us. The Merino wool and nylon blend keeps our feet comfortable while hiking on hot, dusty trails and stands up to frequent use season after season. The lightweight cushion on the soles of our feet helps keep us feeling fresh by reducing fatigue from repeated impacts.