The Polar Pro FRAME2.0 Polarizer filter is designed for filming in bright, suny conditions. The Filter reduces glare bouncing off of water, snow, and the sky. The Filter simply onto the Hero3/3+ camera lens, when the camera is outside of the waterproof housing. The polarizer can be used virtually anywhere outside to increse color saturation, Improve Contrast, and turn the sky into a deep blue. We snap a polarizer filter on while: Skiing, Snowboarding, Surfing, Wakeboarding, Skydiving, Biking, we pretty much have it on as long as the sun is out. Filter quickly slides on/off of Hero3/3+ camera lens. For filming outside of waterproof housing. Reduces Glare off water, snow, and the sky. Increases color saturation making colors pop. Offers Lens protection while filming outside housing.