Reference: 397476 Wool and polyester play perfectly together in the X WOOL LS TEE for men. The comfortable and regulated warmth of wool is combined with lightness and durability of poly to create a superior piece that stands up to the rigors of cross-country skiing, ski touring and running. An excellent first layer choice for any mountain activity. Technologies CONCEPT/TECHNOLOGY AdvancedSkin ActiveDry FABRICS Merino Wool FIT Active fit Benefits Warmth Wool / poly blended fabric provides great warmth to weight, along with great breathability to reduce moisture that can become cold. Durability Polyester blend adds durability and shape retention compared to pure wool. Softness This garment feels great against the skin, and only gets softer the more you wash it.