It is fun to shop for mens pajama pants from the large assortment of designer sleepwear at Old Navy. Find men’s pajama pants in plaids, patterns, stripes and more colorful fabrics. Our masculine mens sleep pants are available in a variety of sizes and lengths so that guys can get a comfortable fit. Guys love the NFL® pajama pants for men from this selection. Our machine washable, 100% cotton mens pajama pants are available with NFL® team graphics embroidered on the front. Mens pajama pants from Old Navy make great gifts for any guy on your gift list.