When ectomorphs find clothes that fit well, it is a big deal. Clothes are generally not well fitted in retail stores, so I was quite pleased to find this product line called Mercantile by J Crew. They’re well fitting, stylish and athletic. My only complaint with their denim is that it transfers; all over my seat, unfortunately. So I give the shirts 5 stars, but aim on the cautious side regarding their jeans.