100% BCI Cotton. The pajama set includes a classic button-up top with a collar, two patch pockets, and functional button cuffs. The matching pair of pants features a comfortable elastic waistband, drawstring, and side-seam pockets. The long sleeves offer extra coverage and warmth for cooler evenings. Whether you're lounging at home or enjoying a lazy weekend morning, these pajamas will make you feel chic and comfortable.