Sara's Prints Big Girls' Puff Sleeve Nightgown, Sleepy Hedgehogs, 12 55% Cotton/45% Modacrylic Imported Machine Wash Our puff sleeve gown is made of a super soft blend of 60-percent cotton and 40-percent mod acrylic that is inherently flame resistant without the use of topical chemical treatments. This gown features pretty stretch satin elastic at the neckline and sleeves, a satin bow, and decorative stitching around the bottom ruffle to make the print really pop