Here we have a goal of protective UV filter for GoPro Hero 3 and 3+. He can not use it if it is used outside a box polycabornate, or with the simple frame mounting GoPro. However, it will use light in certain angles that can cause unwanted reflections in the GoPro. Please note that this filter offers no waterproof protection to your GoPro, so be careful splash because GoPro very resent moisture out of their watertight compartments.