Set of 12 Pcs Anti-Fog Inserts for GoPro Hero 1, Hero 2, Hero 3, Hero 3+, Hero 3 Plus, Hero 4 Cameras Compatible with GoPro Hero 1, Hero 2, Hero 3, Hero 3+ / Hero 3 Plus and Hero 4 cameras Made of absorbent silica paper 100 % reusable, will last for approximately 4 uses Prevent a camera's housing from fogging, even in cold temperatures or humid environments Package includes: Anti-Fog Inserts x 12