Maine Coons are not hypoallergenic, and not suitable for person with mild to severe allergies. They’re known for their long, dense coats and friendly temperament. The coat length of a Maine Coon is the result of a genetic mutation. This mutation gives cats that carry it a recessive gene that causes them to produce excess hair. Maine Coons are not hypoallergenic because they can cause allergic reactions due to their high levels of dander and shedding.