Hanna Andersson pajamas are crafted in organic cotton knit that's combed for extra softness, with Super-smooth flatlock seams that surrounds them in first layer comfort for better sleep and better play the next day! Hand-me-down quality means that 50 washes from now they'll come from the dryer bright as ever! -Organic combed cotton rib knit -Super-smooth flatlock seams -Encased stretch waist