I know sometimes these reviews show on more than one style of a product. I got the boxers & I believe they are made from nylon/spandex. Mine are boxers, not boxer briefs.These are my most comfortable underwear. They're lightweight material, they wear well under clothes and they're loose enough to be super comfy.I have other brands and styles I like. Nylon/Spandex boxer briefs are great for staying more sleek and fitting so smoothly under clothes, but especially for summer in Florida, the loose & airy fit of my Bolter boxers is a better all day experience.My only gripe at so far is that a get a slight wedgie with them sometimes. Sounds funny of course, but it's just what seems to happen. Nothing to do with them being tight, they're not. I think it's actually the looseness and flexibility of the material that lets this happen more easily. It's not a big deal at all, but it's my only complaint on these. Well except I'd love them to be $10 cheaper per pack! :)