Aqua Protect Sterile XL/XXL: Sterile plasters for larger and post-operative wounds. Hansaplast Aqua Protect Sterile XL and XXL plasters are sterile wound dressings for waterproof protection of larger or post-operative wounds. With their waterproof, flexible film and strong adhesion, the plasters are ideal for washing, showering, bathing and swimming. The large wound pad cushions your wound without sticking to it, providing high comfort during wearing.