SELECTED MATERIAL: POPKOK mens cotton underwear, made of 95% premium cotton and 5% spandex, combine softness and breathability wicks away moisture and keep you comfortable and dry all day long. ERGONOMIC DESIGN: The classic mens boxer briefs are designed with functional fly, providing convenience and support to your private areas, making wearing more refreshing, comfortable, and freer. Removed the side seam and changed it to a back support line, while improving the wearing comfort, giving proper support to the hip and look more fashionable. OPTIMIZATION DETAILS: Soft and stretchable wide-brimmed waistband, no chafe flatlock stitching, no scratchy tag, and no ride-up legs, keep you away from uncomfortable restraints or irritation. FIND YOUR BEST SIZE: The mens regular & plus size underwear are from size S-5XL. You can measure the size according to the following methods. Run the measuring tape around your waist (on the skin), at the height you intend to wear your pants. Adjust for the desired snugness whilst ensuring there’s room for one finger. If you're right on the border and like a looser fit, please take one size up. MULTIPLE CHOICES: POPKOK 5 pack mens boxer briefs are in a variety of colors and sizes, which are also great gift ideas for men or teenage boys. POPKOK Men's cotton boxer briefs with functional fly,Which will providing more convenience and support to your private areas, making wearing more refreshing,comfortable and free.Of course, it has always been the goal of POPKOK to continue to explore comfortable, healthy, safe and fashionable underwear. We would love to hear your suggestions and make our products more in line with your expectations. Thank you very much for your attention.