You just don"t get cozier than slipping into a comfy pair of flannel pjs on a cold winter night. The Hanes Men"s Flannel Pajama Sleep Set is quite possibly the perfect pair of flannel pajamas. The sleep set is made of 100% soft cotton. The long leg flannel bottoms have buttons so that you may adjust the size. For added comfort the elastic waistband is covered with fabric. The long sleeve button down top has 4 buttons and one front pocket.