The Basics It's backless, strapless offers support, and the center clasp creates natural cleavage and even more support.  The Benefits Strapless and reusable for up to 30 times. The Advantages One of the latest innovations in backless, strapless support. The Specs Available in cup size A/B and C. The Bottom Line Incredibly light, airy and water resistant and stretches for comfort, shaping and reliability.