Drop GoPro's Hero3 Anti-Fog Inserts into sides of camera housing to prevent fogging in cold and humid environments. Inserts will last for approximately 4 uses and can be dried out for reuse. . Includes 12 Anti-Fog Inserts. Compatible with all HD HERO3 cameras. Instructions for drying and reuse: heat inserts on a pan in oven at 300?? for 5 minutes. Store in an airtight bag 818279010121 27014800015 AHDAF-301