Clothing styles change all the time, but there are a few looks that are never flattering.
Fashion trends change every season. One season slim pants are out, then next they're in. One season pantyhose is in; the next it's out. The constantly changing world of fashion these days makes it hard to look too out of place. But there are some things that are wrong in every season.
Most fashion faux pas that stand the test of time focus on underclothes, fit, and accessories.
One more general note. Looking sloppy is always in poor taste. Over the past decades, more casual clothes for day wear have been created. But this is being taken to the extreme. Not only do people wear sweat clothes every day, but now you will see people in pajamas and slippers wandering into the local coffee chain for their breakfast. With any luck, this trend will begin to die out.