My wife and I both have the bell pitboss and we love them.
I got one last year, my first and only half helmet.
Definitely great on a hot, humid day! I just make sure to have sunscreen on my face to prevent sunburn.
My head size is borderline medium/large, 58 cm, so I was going to get a medium but felt far too tight. The large has been perfectly fine thanks to the ratcheting headband adjuster.
My only complaint about my Pit Boss is the D ring pulltab. The material frayed within months So I removed that and put a strip of leather on instead.
I think the fault is with the D rings not the tab material, they aren’t rounded like most helmets, they are flat with sharp edges.