Prevent-your-camera-39-s-housing-from-fogging-even-in-cold-temperatures-humid-environments-Great-value-and-performance-includes-3-sets-of-anti-fog-inserts-Each-set-lasts-4-5-uses-and-can-be-dried-in-an-oven-3-minutes-and-used-again-What-39-s-Included-3-Sets-of-Anti-Fog-Inserts