Four Piece Construction Print Pajama Set Make bedtime a breeze with not just one but two pair of jammies your little one will love! This 2 pack, Four Piece pajama set for boys from Carter's includes two long sleeve tops and two coordinating pairs of pants. These pajamas have a snug fit to keep him comfy all night long! Cotton pjs are not flame resistant. To help keep children safe, cotton pjs should always fit snugly.. 100% cotton rib. Imported. Machine washable.