Please see their website for more details, but some key features include:
https://www.araiamericas.com/vx-pro4-technology
-Smooth Shell (R75 Shape) results in less protrusions to minimize catching and digging into the ground during a crash
-Rear air duct
-Emergency release cheek pad system
-Removable neck roll
-Intermediate Oval Shape
*Comes with original Arai Box and paperwork*
Arai sizing chart on their website: https://www.araiamericas.com/vx-pro4-technology