Not that it hasn't been said already, but thin armed glasses - Serengetti's are good and gel, not foam pads on the cups. Also useful are cloth covers for the ear cups as you'd be surprised how much your ears sweat (unles it's just me
)
Try putting the bits of the sunglasses that go over your ears about an inch higher than you normally would, so that they just get held in place by the very top of the gel ear seal. This'll help the seal and it'll make things a LOT more comfortable.
A while ago they used to sell glasses that didn't have the temple (side) pieces. Instead, they had a loop of fishing line or something. The idea being that this was thinner than the thinnest thin sun glasses that had been on a diet for a week and had then run a marathon. Not seen those for sale for a while though. Perhaps it was so thin that people started slicing off their ears.
