Huge Silicone Breast Forms | Z Cup | Cotton FillZ Cup. No Apologies. These massive Z cup breast forms are for performers who want the most dramatic, show stopping chest possible. Made from food grade silicone with a soft, tear resistant construction, they deliver an enormous, realistic silhouette that commands attention from every angle. The cotton fill keeps the weight manageable at approximately 4. 6 kg comfortable enough for long performances without sacrificing volume. Available in Asian Yellow