Wet System bathroom wallpaper from Wall & Deco. You can order wallpaper from the Wet System collection from Wall & Deco online with us! Wallpaper in the bathroom is all the rage right now. Design wallpaper that gives your bathroom a unique look. Wallpaper from the Wet System collection from Wall & Deco can be placed in the shower, completely waterproof! Amazing designs make this bathroom collection very special.