Nautica Sleepwear Men's Short Sleeve Shirt & Flannel Pant Pajama Set Nautica Sleepwear 2-piece set. Short sleeve crew and brushed flannel pant. Top: 100% Cotton. Bottom: 100% Cotton. Machine wash cold. S=28-30 / M=32-34 / L=36-38 / XL=40-42 / XXL=44-46