这条裤子很方便穿。

Is that you think the pants make you feel Comfortable? If yes, here have some examples Eg:這條褲子很舒服 Eg:The pants are very comfortable Or Eg:這條褲子讓我覺得很舒服 Eg:The pants make me feel comfortable If you think the pants are convenient You have to think convenient for what You can make it two part The pants are so convenient . l can do something(explain why) EG:這條褲子很方便, 我可以用來做運動 Eg:The pants are so convenient. I can use it to do sports (and that's mean the pants are flexible) Or You can use just one part Eg:這條褲子拿來做運動很方便 Eg:The pants are convenient for sports Sorry for bad grammar Hope you can understand and my answer useful

The most authentic expression：这条裤子很好穿。

Fighting :)

Dear Alex This is William from China This sentence is correct in grammar But it meaning is vague: 这条裤子穿起来很方便 这条裤子携带很方便 这条裤子清洗很方便 Which one do you want to express?