Tbh I take a xs helmet and choice is very limited. The spesh deviant 2 my son gas is lovely and well vented and looks like it gives more protection than the urge. I did find the xs 661 comp nice and light, but still a little loose on me and did not cover my head as well as I’d liked.
If you take a xs you could try the spesh, but it will probably be too big. I found the 661 xs helmets a little big and I ended up with a bluegrass full face helmet in xs.
I tried loads, had a go at some tld in morzine, but all too big.
If you take a xs and you found one that fits, I’d say don’t worry about the venting.
Simone