The UV Replacement packs of 5 or 10 filters allow the active GoPro Hero 3 user to use and abuse their favourite filters without the need to repurchase a full kit. The UV filter has a slight yellow (or minus blue) effect that corrects for atmospheric blue at high altitude and reflections from snow and water. This filter will be ideal for paragliding, mountaineering, snowboarding, water sports and more. These filters will only work with the Formatt-Hitech GoPro Hero 3 holder.