There is nothing relaxed about this fit. If your looking to wear anything under this shirt get a size up. Shirt feels good but a bit tight all around. I'm 5'10 160lbs and I'm returning my medium for a large.
OK so i've tried about 3 other brands or so and I just can't say enough how good these fit like like no other. Granted I wear glasses which was why I got the a-frame becasue of the wider sides but even if I didnt wear glasses I would still go with them. Other companies are just cheap and the foam is cheap just not up to par with the a frame goggle.