Incredibly soft and breathable, yet insanely warm, The Chamula Alpaca Loose Rib Sox takes the natural moisture-wicking and warmth-retaining properties of Alpaca and blends it with more resilient fibers. The result is the most comfortable, durable sock you’ll ever own. And with a fit designed to sit loosely around your calves, it’ll make several hours on your feet feel like a casual stroll in the park.