“If you have a large selection of bras in rotation, you can go longer than six months before replacing your bras if you’re caring for those bras properly,” says Ali Cudby, author of Busted and Fit My Bras, and founder of Fab Foundations. “Putting your bras in the dryer breaks down the elastic much more quickly, so save your bras from an untimely death by letting them air dry and hand wash them when possible.” No matter how many bras you own or how well you care for them, every bra has an expiration date, thanks to weight fluctuations and natural wear and tear. Here’s how to know when it’s time to buy a new bra, according to experts. RELATED: How to Measure Your Bra Size at Home “If there is a small amount of spillage over the cups, but the cup size is correct, try loosening the straps a little,” she suggests. “You want to be able to comfortably fit two fingers between your skin and the strap for the best fit.”