The "old style" jockey helmets (looks like an egg) do not have any
holes. Right out of high school I used to ride TB's at the track (exercise
rider/jockey wannabe). We wore these helmets that were simple, but very
protective. I don't know how many times I was on a horse that stumbled and
fell during a stakes race, and my head is fine (I think). We also wore these
during cross country when I got heavy into 3 day eventing. They are very
plain looking and rough on the outside. This is so your helmet cover,
which you can get in a million different color combinations, will "stick" to the
helmet. They still use these helmets today for these two sports.
Yes, they are very hot, no ventilation, but also very light weight and don't
look huge on your head. And you can get several different covers to go
with whatever mood you're in that day. I had one made with a little
propeller on the top like Elroys. (but, I can't remember the name of
it...) I believe State Line Tack sells them, and Dover Saddlery. The
helmet itself has no visor, but the helmet cover does. You'll know it as
soon as you see it. I'm glad you reminded me of this, I was looking
at getting a new helmet, and I think I'll go back to this one, I really
loved that helmet.