Washable Stretch Silk Tank Midi Dress. New Got bra straps? We’ve got you. A higher tank neckline with back button closure makes this sleeveless midi dress friendly to all bras. In premium mulberry silk with a hint of stretch, the bias cut skims the body in an incredibly flattering way. And like all our silk, it’s washable. As a bonus, silk fiber contains 18 kinds of amino acids that make it amazing for skin nourishment, hypo-allergenic, and naturally thermoregulating to help maintain body temperature.