If we want our jeans to last longer, then wear them 4 to 5 times before you wash them, according to Real Simple.

What to know: Durable denim is excellent at masking dirt—which is a good thing, since overwashing can cause jeans to fade and fray. To keep yours looking like new (or “weathered” just the way you want them): Throw them in the washer inside out and use cold water. Avoiding the dryer will help retain color, too.

Exception to the rule: Take them for a spin cycle sooner if they stretch out. Or just toss them in the dryer for 10 minutes (but no more than that). Spandex-heavy “jeggings” (jean leggings) should be washed after every wear so the knees don’t bag.

According to Real Simple magazine we shouldn’t wash our bras after every time we wear ‘em.  Instead wear them 3 to 4 times before washing to prevent damage to the elastic.

What to know: Bras don’t come into direct contact with the underarms, so they can withstand a few wearings. But they need a 24-hour break between wears for the elastic to recover, so try a rotation system: Line them up in a drawer. In the a.m., take a bra from the front, then send it to the back of the line in the p.m.

Exception to the rule: Sweat a lot? Then wash bras daily with a gentle baby detergent, like Dreft. “Perspiration wears down the elastic, so keeping a bra clean will increase its life span,” says Jennifer Manuel Carroll, owner of the Seattle lingerie shop Bellefleur.