If you are looking for the perfect white t-shirt, look no further! This one is thick enough that it is not see-through. The cut is also perfect - I get compliments on how "sharp" and "put together" I look every time I wear it, which is awesome for just throwing on a t-shirt! I am always afraid to purchase white tops because they tend to be see-through, so after owning several other colors in these tees and loving them I went for it and am so glad I did! Sizing seems pretty true to size. I am 5'9, 180lb with a long torso and the regular length in Large is actually quite long, down to my hip (I almost always need Talls at Eddie Bauer). The ONLY criticism I have is that some of the solid colors stretch out a little after wearing them a few hours, but the heathered colors don't seem to do it.