As I read other reviews, I see these are sized a little large. I am a XXL guy, 6'6" and 280 pounds. I ordered XL and it is a perfect fit. Snug, but not tight or binding. They feel light weight, and are very warm when layered. The material is soft and comfortable. The seams appear to be reinforced with stitching. There is no fly opening in the front. The sleeves and legs are a bit long, which is a plus in my case, because most clothing articles are short in sleeves and legs. Wool wicks away moisture and will keep you warm when wet. Quality product.