Review on GoPro Anti-Fog Inserts: Ensure Clear Vision with Official GoPro Accessory by Christian Bar

Must have for your Gopro! If you go on vacation where the temperature is very warm and you plan to use this in the water, you should buy this! Your camera will fog up, otherwise I wouldn't use this. I bet three at a time when we were going out somewhere. Two on the bottom and one on the side and no problem! =