This is a good item of clothing to layer under a sweater or sweatshirt to ward off Winter's chill.  It fits comfortably - not too snug or too loose - and is a welcome addition to wear under another garment.  It is medium weight; a little heavier than a t-shirt.  The crew neck might show under anything that is cut low - it is strictly casual; no lace or applique.  It could also be worn alone with jeans when the weather gets warmer.