Metal armor and overheating

Even if a character is fortunate to find a suit of steel plate armor, wearing it in the brutal heat of the Arthasian deserts is foolhardy.

Characters wearing heavy metal armor take a -5 penalty to Endurance checks resulting from heat, stifling heat, or any other endurance checks made to resist the effects of heat.

Metal armor and overheating

Dark Sun: Seared to the bone pord pord