COSMOS GoPro Anti-Fog Inserts & Black Cover Protective Camera Silicone Lens Cap Cover Housing Case for GoPro HERO 4 Cameras Inserts prevent fogging of lens in cold and humid environments Silicone cover protects lens from dirts, scratches Shock absorbable and anti-bump for extra protection Fits Gopro Hero 4 Package includes 12 pcs anti-fog inserts and one silicone cover