"Sin Alcohol" in Spanish means "Without Alcohol" or "Non-Alcoholic" in English. You would commonly see this expression on the labels of beverages, particularly beer or other drinks that typically contain alcohol, to indicate that the product is a non-alcoholic version. So, if you're looking at a bottle of beer in Spain (or a Spanish-speaking country) and it says "Sin Alcohol," it means that the beer is non-alcoholic.