I bought three pair of these 8 years ago. all different colors, black white, black yellow, and blue red. I work out four times a week. I wanted some more because working out four times a week sometimes 5 or even 6 so I have to wash frequently. so literally 8 years later I bought five more pairs and you know what they fit the exact same. these are great my workouts are two to four hours long. lots of sweat. there's no ribs or holes from the ones I've had in the past, except one out of the think I have five and again this is 8 years or so ago. and the ones I bought just about a month ago fit and are made the exact same way. these are great workout pants.