This is the Polar Pro Venture Polarizer Filter for GoPro Hero 4/3 Cameras

Features:

• Polarizer filter for filming in bright conditions near snow or water. reduces glare and prevents overexposure
• Reduces Glare and Prevents Overexposure
• Glass Lens For Superior Scratch Resistance
• Easy Slide On/Off Design
• Increases Color Saturation and Improves Colors
• Fits On: GoPro Hero4/3 Waterproof Housing
• Note: GoPro Camera and Housing is NOT included

It has certainly come a long way and has transformed into an extremely easy to use filter for the GoPro Hero3 . This newest version features a brand new glass filter, which has better optics, and is even stronger than the last edition. Also, we beefed up the frame and over molded the glass to increase durability even more.