Fat Cat Luxury Diving Color-Correction Filters + CPL Fileter set with 58mm High Precision CNC Aluminum housing convertercompatible with all the Hero3 housing. This luxury kit contains all the filters you need when above and below water. - CPL (Sun & Snow) - Reduces glare from sun snow and water. Use it anywhere on land when bright out. - Red (Blue & Tropical Water) - Needed to capture vibrant underwater colors at depths of 10 to 65 feet. - Magenta (Green Water) - Reduces the green tones when filming in green water at depths of 1 - 70 feet. Armed Your Heroes Enjoy the underwater adventure.