Nobody wants to waste time and to face the inconvenience that come with irons for curling hair in summer, and in addition to that, especially when you are preparing for a quick exit from the house early in the morning.
Then why to get up a few hours earlier to prepare when you can do it overnight?
There are two ways of arranging the hair that you would not need iron for hair, but all you should do is to prepare overnight.
Sounds pretty easy right? Lie in bed and just do not wake up with messy hair, but with hair ready in less than a minute.