The Inner:Dual Merino Long Sleeve is a technical wool base layer that has been carefully designed for adventurers who value high-tech performance and maximum comfort. The double-layer knit construction combines a wool-polyamide blend on the outside with a soft polyester lining. This two-layer design not only enhances insulation with additional loft, but also improves moisture wicking. When worn, sweat is quickly wicked away from the soft inner layer to the outer wool layer, keeping you dry and comfortable. What's more, you'll benefit from all the natural advantages of wool: excellent temperature regulation, natural odor control, and a sustainable, timeless look. Whether you're braving the cold or simply seeking everyday comfort, our Inner: Dual promises unmatched performance and comfort.