Petite Plume debuted the first-ever chemical-free, flame-retardant fabric for children's sleepwear. Fine yarn-dyed cotton is blended with a touch of inherently flame-retardant fiber to pass strict CPSC safety laws without relying on harmful additives. The moisture-wicking flannel is crisp, comforting, and cozy. Snuggly soft and becomes more buttery with every wash.