Say "goodbye" to tearing, stinging, irritated eyes when chopping, mincing, dicing or slicing onion and their relatives. These goggles are the tear-free solution for slicing, dicing, mincing, and grating raw onions. Designed to eliminate a chef's exposure to the irritating vapors when handling onions, these goggles wear like glasses. The comfortable foam seal blocks out irritating onion vapors and the slightly tinted, fog-free lenses provide maximum clarity. Unisex design fits most face shape but do not fit over glasses. They're also great to use at the barbecue! When onions are cut, an enzyme called sulfoxide lyase and sulfuric compounds are released from the broken cells. When exposed to air, they react with one another to form a vapor called thiopropanal sulfoxide. As this vapor evaporates, it irritates our eyes and causes us to cry.Kitchen folklore remedies such as burning candles or matches, slicing onions under water, and freezing the onions before cutting are comical at best. The two methods proven most effective in preventing onion-cutting tears are wearing goggles or contact lenses.