The Polarizer Frame2.0 filter has been completely redesigned and beefed up for even greater durability. This Frame2.0 filter is for when filming outside the waterproof housing with your GoPro Hero4, Hero3+, and Hero3 cameras. The Frame2.0 filter is very easy to install, you simply slide it onto the camera lens and you are ready to go. All new for this edition is new glass which is much better optically and even more durable. The construction of the Frame2.0 is also much more built including an over mold protecting the glass. The Frame series is a series designed for shooting outside the housing, where you do not need the waterproof housing, and you are looking for an even sharper video. We shoot most of our ski videos, car videos, and quadcopter videos with the Frame2.0 filters. We use this polarizer filter pretty much whenever we are filming outside. As long as its not very cloudy and dark, the polarizer reduces unwanted reflections and cleans up the video quite nicely. Sometimes the polarizer is almost necessary, especially when filming on bright bluebird days in the snow, or near water. The polarizer also increases color saturation making colors look even more vibrant. We also slide it on when shooting in the car to remove glare off the windshield, dashboard, and the road. It's a very helpful accessory for the GoPro Hero4, Hero3+, and Hero3 .