Something I Wish Would Come Back into Fashion

What I'd most like to see come back into fashion is the idea of classic clothes that can be worn until they wear out. 

Each season could have a couple of fads, and people who care about such things would remember that e.g. sweaters with poodle motifs instead of reindeer had been the fashion of a certain year. 

Otherwise, men could wear trousers and shirts, with vests, jackets, sweaters, or coats according to the weather. Women could wear skirts down below the curve of the leg, cut full enough not to interfere with power-walking or running, either as one-piece dresses or as two-piece suits, also with top layers according to the weather. People who felt bored with these basics could wear the fad of the season, but this would be perceived as childish and would put the fad wearers a step down, not a step up, from fad ignorers. Apart from special gear for work or sports, few people would really need to buy clothing after age thirty.

Further, to help everyone separate our opinions of people's work or their character from our opinion of their clothes, everyone in church meetings or in courtrooms could put on robes that would cover all other clothing. This would no longer be the privilege of the choir and preacher or the judge alone. Robes would be kept in the church or courthouse and handed out for the day.

It would feel more worthwhile to make clothing for oneself or others, by hand, and more handmade clothing would probably be worn. It would be less profitable to mass-produce stacks of faddy clothing no one would ever wear, and fewer resources would be wasted in that way. Fads might be easier to sell if only one of each fad item was sold in a town or neighborhood, so that people who really wanted to be the one with the purple vest would wait in line to buy it for a high price, and others would have to settle for standard-cut purple shirts. 

Because fad items were so overpriced, people would be likely to want to keep them  after the fad had passed. This too might reduce waste  Marketing this approach to fashion would probably require a general sense of contempt toward the idea of wasting money on fads, but the fad items might come to seem justified if they were especially flattering to their owners, or recalled happy memories.