Buy the right size
"These underpants are very nice. They have a really wide, flat waistband. They are very soft. They would be even better if I bought a smaller size. They do shrink a tiny bit. Maybe I will wash them in hot water to see if they will shrink a bit more. I do recommend them. I think I would say they fit “true to size”. My problem is I should wear a medium, not a large."