Flat irons, also known as hair straighteners, are electrical devices used to straighten and style hair. They consist of two heated plates that clamp together, allowing users to glide the device down sections of hair. Flat irons come in various sizes and materials, such as ceramic, titanium, and tourmaline, which can affect heat distribution and hair health. Using a flat iron can help achieve sleek, smooth hairstyles, but it's important to use them correctly to avoid heat damage. Many people apply heat protectant products before styling to minimize potential harm. Regular maintenance, such as cleaning the plates, can also prolong the life of a flat iron.