It's simply to get the most life out of your bra. Spin cycles and high heat don't mix well with the fibers and elastics in lingerie. The better the care, the longer your delicates will last you. To get the most out of your lingerie, it's best to play it safe and handwash in luke-warm water. We get it, sometimes it's easier to toss it in the machine. If you don't have time to handwash, be sure to use the delicate cycle on your machine and lay flat to dry.