This is a US military issue ECWCS (Extended Cold Weather Clothing System) Gen3 Level 2 midweight shirt. A high-performance inner layer officially issued by the US military. The inside is a grid-structured fleece fabric, providing excellent moisture wicking and heat retention. It feels good against the skin and is lightweight and easy to move in, making it ideal for outdoor activities, camping, and mountain climbing. Please understand that this is a US military surplus item. 【Condition】 It shows signs of use, but is in generally good condition. 【Size】M-R 【Color】Sand (Desert Tan)