The Arab's tent... actually consists of two separate tents. The outer tent is white and acts as a heat-reflective layer. The lower-inner tent additionally protects... by providing a blanket of moving air between the two tent layers.... this tent system also illustrates the two, most basic principles of summer cooling: reflective insulation and ventilation.... One system must supplement and reinforce the other.

The Owner Built Home: A How-to-do-it Book (1972)