The Polar Pro Venture3+ Polarizer filter is designed for filming in bright, sunny conditions. The Filter reduces glare bouncing off of water, snow, and the sky. The Filter simply pushes onto the Hero3+ waterproof housing. The polarizer can be used virtually anywhere outside to increase 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 and off of Hero3+ Waterproof housing. Reduces Glare off water, snow, and the sky. Perfect for: Skiing, Surfing, Snowboarding, outdoor sports. Increases contrast, makes colors pop.