Drop these Anti-Fog Inserts into the sides of your GoPro camera housing to prevent fogging in cold and humid environments. Inserts will last up to four uses. To dry out and reuse, heat inserts on a pan in oven at 300º F for five minutes. Store in an airtight bag. Insert these Anti-Fog Inserts into any GoPro waterproof housing or dive housing to prevent fogging in cold and humid environments. Inserts will last up to four uses. Reusable up to four times Include 12 Anti-Fog Inserts Compatible with: All GoPro cameras