Very well made shirt. No doubt you will notice how good the material is from which it is made. It's a high-quality blend of fabrics that's incredibly comfortable. It washes well and shows no signs of size or color change. I wouldn't call it "heavy duty" but it does have some weight compared to other shirts. point size. Remarkably, the arm length is perfect for me. I wear a medium size and it hasn't been as short as others in the past. Very nice shirt, perfect for winter and cold weather.