system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do people in Australia for example wear mostly shorts and t-shirts during the summer but people in the middle east wear long, drapey clothing? Is one better than the other for dealing with the heat?
gpt
Shorts and t-shirts leave exposed skin open.  This allows sweat to evaporate from your skin, which cools you off, and also allows the wind to cool your body.

However, if temperatures become *too* high, even the wind won't cool you anymore.  And exposed skin is vulnerable to sunburn and to dust/sand kicked up by desert winds.  So people in the Middle East have found that they actually remain cooler by wearing clothing to keep the sun and wind off their bodies.  In addition, in the desert it not only gets hot during the day, but cold during the night.  That long clothing serves a second purpose of keeping the people warm at night.