Song Joong-ki in Descendants of the Sun. [Photo/Mtime]

The mercury and humidity is soaring, along with the need to cool down.

What better way to cool down than getting a cool haircut, in every sense of the word?

The messy short cut

If you are the lazy type, the short cut is probably your best bet. Short cuts are longer than crew cuts, so you will still look good without looking like a soldier and you won't have to put in the effort to style your hair.

South Korean actor Song Joong-ki, one of the hottest stars in Asia at the moment thanks to his role in Descendants of the Sun, has kept his hair cut short ever since he finished his mandatory military service.

Read more: Trends: 'Cool' hairstyles for men