How about "especially while training"?
I wore a helmet in the mil and I wear one in the air, even (or especially) in the Robbie. Does it look ridiculous to others? Perhaps. But I find it to be hugely comfortable and - as I wear corrective lenses - having the smoked shield to pull down when needed goes a long way toward extending my day. Add CEP and life is just about perfect.
When I was training with Bristow in Florida, the lid was a good sweat absorber. Oddly enough, when I transferred to Bristow California, I was forbidden from wearing my lid because the staff was afraid that an emergent situation would find my helmeted head coming in contact with the un-helmeted head of the CFI. I found the argument slightly flawed and was never comfortable in just a headset.
If anyone stateside needs an SPH4B in great condition, including a new Zeta liner and comfy earcup muffs and sweat covers, feel free to PM me.