This is the Trident Standard Defog 2 oz bottle Features: Mask defogging solution Non-toxic spray solution 2 oz. bottle Easily defog your mask to get a clear view for any dive. This 2 oz. Trident Mask Defogger is the perfect small accessory to toss into any gear bag and have on hand as you prepare for your diving adventure. Its non-toxic solution is safe for any plastic or glass lens and is safe for the surrounding silicone. It&';s non-irritating and convenient to use.