Not all armour works as it should do, and these thirty suits of armour all have something wrong with them. (Until I can get it fixed somehow, only the main page link to this submission is working.)
A common mistake when writing adventures set in deserts is to assume that the climate is too ferociously hot to wear armor. Historically, most battles in deserts involved troops dressed in protective armor. Although they would have been miserable during the hottest part of the day or the hottest part of the year, desert weather isn't intolerably hot 24/7.