hi jens,
completely out of my sphere with ancient greece, but the indian armour held both in its armoury (solid helmets and plate/mail). if you compare the two types, you would think that the plate/mail would give you more freedom and ventilation. however, its the nature of antiques, that the cloth liners dont survive the test of time, unlike the steel outer 'skin'. early accounts tell that the lining itself was the main protection, and the mail/plate just added to it. the 'sind' armour, although of a later manafacture clearly shows this and the few examples that survived, show a thick, quilted lining that cant have let in much air.
not sure how much a human brain can take, but know mine cant take much, with or without a hat :-)
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