I'm sure all of you see ads on the forum, and this one always make me laugh. I certainly notice that the young lady is very attractive, but going from the helmet she is wearing, I figure she must be my age by now because that helmet looks very much like the first helmet I ever owned, probably 1990 or 91.
Just like this young lady, it was hot, hardly any air vents and I used to take it off on hot climbs because I sweat so much with it on, and I've never been much of a sweater.
I left it on the grass one day when locking up my bike and someone stole it.
Fast forward about 20 or 25 years and it's great how there are so many reasonably priced helmets with excellent ventilation and very well thought out strap and those dial adjusters--fantastic for me commuting when I change layers of thin beanies or balaclavas in cold weather.
A few years ago when riding to Boston, it was often around 100f and sure, it was damn hot, but it was easy to always have my helmet on, given how well it lets air through.
I've had this helmet at least 5 years, have tried on some new ones recently, and there are improvements.
I am surprised however by $350+ helmets out there, where there are numerous in the 75-100 dollar range that are really quite nice.

Remember those goofy Bell early ones? The best story of those early ones is from a friend, her husband had one back in the day, and when entering a small store in New England somewhere, the clerk asked with his Maine accent, "So, d'ya fall down a lot?"