These slate colored socks feature a specially engineered Baby Alpaca & Bamboo yarn combination to harness the qualities of both of these amazing fibers. This particular blend features the comfort and warmth of the Alpaca mixed with the durability and cool softness of bamboo. The result is a mid weight all season sock which is naturally hypoallergenic anti-microbial. Climate Control for your feet . Cozy & Cool. One size fits all Hand Wash Cold / LayFlat to dry