Magicup Polyester, Polyethlene This is a Final Sale Item. No Returns or Exchanges. For all your backless, strapless clothing. Great for prom, pageant or bridal dresses! Reliable, long lasting support. Easy to apply and remove, just 2 steps: peel off liner and press on. Easy to use! Cup Sizes: A, B, C, D. Reuseable (4 uses). Purchase just the replacement adhesive strips as you need, Style 90023.