Sara's Prints Big Girls' Puffed Sleeve Nightgown, Chevron, 12 60% Cotton/40% Modacrylic Imported Machine Wash Our puff sleeve gown is made of a super soft blend of 60-percent cotton and 40-percent modacrylic 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.