These seasonal PJs are a thicker, smoother cotton than most. Our little wearer likes a loose fit that only comes with a slightly larger size. Love the tight ankle and wrists to allow a child to grow into a size over the season of wear without having to cope with folded over cuffs. The drawback to this particular pair is the graphic is an appliqué that, although backed with fabric, is an "itching point" for the tactical child. Another reason I bought them larger than usual size - a soft cotton shirt can be worn underneath.