Can I machine wash my bras?

Yes, you can machine wash most bras, though it's contingent on following the proper steps.

First, make sure you're using cold water on a delicate cycle. Place each bra in its own mesh lingerie bag with hooks fastened. Wash with other light delicates only, and use a mild detergent without fabric softener. After washing, gently reshape any molded cups and air dry flat or draped. Never use the dryer, as heat breaks down elastic and deforms the engineered structure that provides your support.