I have quite a few thirsty covers and have been impressed with them. While they feel thiner than other brand covers I've had no problem with the PUL delaminating. They are double gusset which is a plus. Velcro is good for a nice snug fit with littler babies but as they get older they can sometimes pull the tabs off themselves. Although onesize they work better on bigger babies once they get a little chubbier.