The Anita Care Pure Fresh Shell Swim Bilateral Breast Form (1047X) is specifically designed for activity, including swimming. This single breast form is thermal, chlorine and salt water resistant. The tapered edges create a natural transition to your skin and disappear under clothing. Made from 100% Silicone. If you prefer a breast form with a grooved underside, check out the Anita Pure Fresh Swim Breast Form (1086X), sold separately.