The Backpacking features Wicking Rings™ and Wicking Channels™ for superior moisture management. Super soft cushion protects feet on long excursions. A comfortable blend of alpaca and merino in the toe and heel insulates in cool weather without being too hot in warmer climes. Content: Absorption Zones: Blend of Alpaca/Merino Wool, Transfer Zone: Alternating rings and channels of Alpaca/Merino Wool and ECO-Dri™, Evaporation Zone:ECO-Dri™ |