<p>I personally think 15 is a lot, but if you aren’t planning to do laundry every week-ish and wear a new one everyday (something I wouldn’t recommend), then go for it.</p>
<p>The reason I think it’s unnecessary to wash a bra after everyday (unless you’re an athlete or just sweat a lot) is that it’s not great for the elastic and the fabric to be washed and dried after every wear. If you swap out every now and again to let the elastic go back to normal, that’s one thing, but unless you sweat buckets it seems unnecessary.</p>