Reliable Heat Retention: This insulated shirt for men features our dual-layer fabric which traps air between the layers to provide a natural barrier of warmth Relaxed Fit: Our men’s thermal long-sleeve shirt features a tagless design and flat seams; Fits loose on the body to allow for full range of motion Efficient Design: Our tagless thermal shirt is equipped with convenient rib cuffs and a drop tail that provides coverage without restricting freedom of movement Comfortable Base Layer: Our men’s thermal shirt is constructed of a comfortable cotton blend enhanced with polyester for added stability and utility Multipurpose Apparel: Our men’s long johns allow for minimal layering in cold to very cold conditions during low- to medium-exertion activities; Perfect for casual or active wear