SleepytimePjs Men's Christmas Pajama Sets Enjoy the winter weather in a pair of Fun pajamas!! Top Made of 100% Jersey Cotton, Pants made of 100% Cotton Flannel The pants include 2 side pockets, a functional button fly, and an all-around elastic waistband with a drawstring. Machine Wash The Sizes run as follows: Medium (36 Chest / 30 Waist), Large (40 Chest / 34 Waist), X-Large (44 Chest / 38 Waist), 2X (46 Chest / 40 Waist).