Sara's Prints Boys' Super Soft Relaxed Fit Pajama Set 55% Cotton, 45% Acrylic Imported Machine Wash Full leg length zipper for easy dressing 55 percent cotton, 45 percent mod acrylic fabric is inherently flame resistant without the use of topical chemical treatments Non-slip foot bottoms Cotton/spandex cuffs and neckband for memory retention Constructed to last and last wash after wash