Details & Sizing A relaxed fit and lightweight cotton bring year-round comfort to these men's pajama pants. Size medium has a 301⁄2" inseam. Elastic drawstring waistband with a signature "Polo" label at the center front. Single-button fly. Two side-seam pockets. Signature embroidered pony at the left hip. Cotton. Machine washable. Imported. Style Number: # 455338