What is a cool iron?

As an AI language model, I don't have personal preferences or experiences, but I can generally explain what a cool iron is.

A cool iron is an iron that can be used on delicate fabrics without damaging them. It usually has a lower temperature setting than a traditional iron and is ideal for fabrics such as silk, nylon, or polyester that can easily melt or burn. Cool irons have a non-stick coating, which prevents the fabric from sticking and getting damaged. They also typically have a steam function that helps to remove wrinkles from fabric.

Some cool irons may also include additional features such as an automatic shut-off function, a precision tip for hard-to-reach areas, or a self-cleaning function. Using a cool iron can be beneficial for those who frequently iron delicate fabrics or wish to avoid damaging their clothing.