I would try to find a dealer who carries that helmet and go try it on.
3 things I never by on the net unless I have tried them on someplace else...
Helmets, jackets and boots.
[I][B]Flat Black Club Member #19[/B]
[B]Stromtrooper Offroad Club Member #11[/B][/I]
[I]2008 Suzuki DL 650 V-Strom[/I]
Grip Puppies, Cramp Buster, Merphs' Brace, H&B Engine Guards, Twisted HWY Pegs, Blairs' Sliders, Optilux 1500 Driving Lights With Yellow Tint Mounted on a Pat Walsh Light Bar, JC Whitney Top Case, Sargent Saddle, GT Moto Tank Bag, OEM Hand Guards, OEM Center Stand, Bare Foot Willie Cup Holder, Hyper-Lite, Rox Risers, MadStad, $5 JC Whitney Fender Extender...So Far!!