We all know how hard it can be to get a restful night’s sleep while it is hot and humid out. You toss and turn all night and just can’t seem to cool yourself off. If you are lucky then you have some sort of fan. Best case scenario you have an air conditioner. However what about if you are stuck with nothing?

Leave it to the Egyptians to develop a very basic yet effective way to stay cool even on the hottest nights. Thanks to the people over at life hacker you too can experience a cool night’s sleep very quickly and easily. All you need is a towel or sheet and some water. Simple enough right? Follow the instructions and give it a try.

Wet a sheet or bath towel that is large enough to cover you with cool or cold water, and wring it or run it through the spin cycle on a washing machine until the sheet is quite damp but not dripping wet. Place the dry towel or sheet on your bed underneath your body and use the wet sheet as your blanket. The damp blanket will keep you cool.