I can't say enough about how useful a shemagh can be in hotter climates.  I keep at least one of these handy in my camping/survival gear for many reasons:

- Keeps you cool when it is wet, either worn just around the neck or wrapped around your head
- Makes a great arm sling
- Can be used as a camp towel or wash rag
- Could be used as a tourniquet in an emergency
- Makes a great bandage wrap for a big wound
- Keeps the sun off your head/neck
- Can be used to pre-filter mucky water that you need to prep for drinking
- Partial head/neck camouflage
- Protects my neck during paintball play while keeping me cool

I keep finding more and more uses for this shemagh.  I now own 4 different colors.  They are easy to wash, and you just let them air dry.  Instructions say to machine wash cold on a delicate cycle or hand wash, and air dry only.  Wring it out, let it air dry for less than a half hour fully opened up, and it's dry and clean.