I bought this for my child, but they only used it once, so I'm selling it. This is a concentrated gel-type anti-fog for glasses, good for approximately 100 uses, and keeps your vision clear even when wearing a mask. - Product Name: Anti-Fog for Glasses - Contents: Approximately 100 uses - Type: Concentrated Gel - How to Use: Simply apply to the lenses - Features: Clear vision even with a mask Thank you for looking.