What is 99 proof?

99 proof is a measure of the strength of alcohol, indicating that the alcohol is 49.5% alcohol by volume (ABV). This means that the alcohol in the product is almost pure ethanol, making it very potent and strong. 99 proof alcohol is commonly used in cocktails and mixed drinks where a higher alcohol content is desired. It should be consumed responsibly, as it can lead to intoxication more quickly than lower proof drinks.