If you’re looking to add a neutral density, polarizer, or macro filter to your GoPro HERO4 Black or Silver, PolarPro has a 3-pack that’s worth a look.
GoPro Filters and Lenses
Reviews, tips and tricks related to GoPro filters and lenses.
Review of the Fotodiox Pro WonderPana Go H3+ Standard Kit for adding a polarizer or neutral density filter to a GoPro HERO 3+.
A polarizing filter on a GoPro Hero 3 can reduce glare and saturate colors. They work especially well above water, with snow, or with bright sunshine.