Mem Cotton Pajama Pants Yoga Pants 95% cotton Imported Fabric: 95% Cotton + 5% Spandex. This pajama bottoms size is based on asian men, so choose carefully when you shop. High quality elastic waistband, very comfortable With the Waistband drawstring design that you can adjust waist size to meet the needs of different sizes, more convenient and practical. Bilateral pockets, high quality workmanship. Washed with water temperature that is below 40  C, Not chlorine bleaching