Don't let anyone tell you it's impossible to mount filters on a GoPro camera. We took our professional WonderPana filter system, and miniaturized it to fit everyone's favorite sports camera; the GoPro HERO3+ and HERO4. When you bolt the WonderPanaGo onto your GoPro HERO3+ or HERO4 case, you're adding a sturdy all-metal mount for our filter system. Your case remains waterproof and sealed against the elements, and now you can add our professional grade filters. The WonderPanaGo is the flagship of our exciting new Go Tough line of all-metal action camera accessories and mounts. GoPro HERO3+/HERO4 Housing Not Included.