Instead of latex you might want to carry nitrile gloves instead. Same fit and feel as latex, you don't have to worry about allergic reactions, and nitrile is much more durable. The down side is nitrile costs more than latex. Nitrile gloves are also good for other than first aid. They do not break down under contact with oil and grease, and are resistant to most solvents. You can use nitrile for first aid and keeping your hands clean under the hood.