not bad. I'm a regular size guy 5'-10" and 175lbs. The normal Hanes size large 100% cotton t shirts are normally a little loose or baggy on my neck, biceps and chest, but not this Nano Premium shirt. Yes it's definitely lightweight and "somewhat" soft, but they are tight. almost uncomfortable in the armpit area. And they are also tight in the bicep and shoulders. Yet still quite long in the torso and fall 4 inches past the belt line. I like em, because I mostly use them for under shirts under my work dress shirts, but the tightness in the armpit is going to take some getting used to.