Performance starts at the base with this ultrasoft, lightweight merino blend crew that wicks moisture, breathes and wears with confidence for any day in the mountains. The foundation of its comfort is our signature PeakWool™ Lightweight fabric, a single-knit blend that combines wicking merino wool with soft yet durable synthetic fibers for powerful performance. We dialed in the details with flatlock seams for smoother layering and less friction on skin, with thumbholes to keep sleeves in place and a hanger loop on the tag for easy drying when the day’s action is done.