I bought these to wear at the gym because most "supportive" boxers dont do a good job at stopping the sweat. These are 95% cotton with a little stretch. Absolutely perfect for what I wanted. I don't like those sport or compressions silky type boxers as they feel gross when sweating. These offer ample support, sized right Bought the medium (I wear medium in all boxers) and do not bunch or roll up my leg. If you are a cotton guy but want a bit of supprt, get these!