This premium defogger is designed to keep the fog out for longer. It is safe to use on snorkeling masks, diving goggles, skiing goggles, safety glasses, swimming goggles, eyeglasses, non abrasive and safe for use on all glass and plastic lenses. Like all of our products our Antifog has been tested and proven safe for humans, freshwater and saltwater marine life making it 100% Reef Safe for use in any body of water. APPLICATION INSTRUCTIONS: 1. Use a small amount on the inside of the lenses. 2. Use your finger to rub completely over the lens. 3. Add a small amount of water and rub the defogger to remove any streaks. 4. Pour the liquid out and you are good to go. Note: Some bubbles remaining are good.