From the manufacturer

Terramar Sports Military Fleece Base Layer Top

• What You Get: A Terramar Sports Military Fleece Base Layer Top that comes in all Black or Military Brown. Available in the sizes: Small, Medium, Large, X-Large, XX-Large, XXX-Large and Tall sizes. For a more relaxed fit, order a size up!
• Made from a high quality blend to create an extremely comfortable and soft base layer pants meant for all day use! Ideal for outdoor riding, hunting ,hiking, skiing, snowboarding, Snowshoeing, cycling and other outdoor activities
• Features: Thermoregulation Terramar Sports Technology that keeps you comfortable in all conditions and engineered to adjust to your body temperature due to our custom ClimaSense technology that helps control your body temperature!