Ragnarok Online (though I hate to bring other games up) had three slots for headgear. They termed the regions 'upper' (for headgear), 'middle' (for glasses/earrings/eye-wear), and 'lower' (for mouthpieces).

While I feel that we don't really need a 'lower' region for headgear, I believe the terms 'upper' and 'middle' sounds slightly more pleasant than 'head' and 'face.'