How to Handwash Your Clothes - The New York Times
We always handwash bras, bathing suits, and delicate underwear. We prefer to handwash silks, woolens, lace, and embellished items. More durable delicates can be washed on the Delicate cycle in a Mesh Washing Bag Bundle. Err on the side of caution—if the item seems delicate, handwash it.