Get them at:http://www.NoFogInserts.com or on ebay at: http://www.ebay.com/itm/181035142169 10 Reusable Inserts Work with GoPro Hero3, Hero2 and Hero cameras Free Shipping US, mailed the day you order ($1.50 international) What They Do NoFog Inserts are a generic Anti-Fog Insert for GoPro camera lenses. They drop into the sides of GoPro housings to prevent fogging in cold and humid environments. How They Work NoFog Inserts are made of anti-fogging adsorbent clean silica paper. They are the same concept and material as what GoPro sells, but at a fraction of the cost! Who Can Use NoFog Inserts work with GoPro HD Hero3*, Hero2, and Hero cameras. Any camera that is enclosed in a separate housing can use NoFog Inserts.*Hero3 owners must split the NoFog Inserts to fit the new thinner housing, with scissors or peel with just your hands. This means you get 20 Inserts for the price of 10!