If you wash your clothing too frequently, you'll wear it down more quickly, but if you don't wash it enough, then it will just be dirty. The folks at Whirlpool have a suggested number of "wears" for items in your closet. Obviously, if something is dirty, it should be washed. For jeans, it's four or five wearings. For sweaters, it's six wearings with a shirt, one or two if worn without. Workout clothes are to be washed after every use. And dress pants can be worn two or three times before they need to be washed.
ANDREWS MCMEEL SYNDICATION