My DD wears a lot of the Carters style button up pjs with feet. Just lately I noticed 2 different moms I know say they put a tshirt or onsie on under the pjs. I never thought to do this and never did it with DS. Just curious how many moms on here bother to do that. I just look at it as another layer or set of buttons to fuss with. I like to keep it easy and neither one of my babies seemed bothered by it.