The helmet also has a passive air flow system due to its two piece construction and although I have not felt a nice cool breeze blow in this opening in the helmet I did notice the escaping of heat in the summer which was probably even better than a breeze.
Overall I am pleased with the helmet and recommend one to all. I would not say they are too expensive because you get what you pay for and money shouldn't be a factor when it comes to the gear you use every day and may save your life. And if it looks so damn cool!!!!
Here are the specs from the Crye Site:
Description
The AirFrame™ ballistic helmet sets new standards in protection, comfort, and modularity. Complete AirFrame™ helmets weigh a full 20% less than complete ACH 2002 helmets while providing more coverage area. The AirFrame™ was developed with a mandate to dramatically reduce head-borne weight while exceeding the ACH frag threat. The AirFrame™ exceeds the ACH frag threat by an average of 20%. A complete medium AirFrame™ helmet weighs only 2.30 lbs., and the large weighs a mere 2.55 lbs. The AirFrame’s™ unique overlapping shell design creates an integrated vent that provides passive cooling and also reduces the damaging effects of explosive blast waves. Each AirFrame™ helmet features an OpsCore™ H-Nape Head-Loc™ retention system for unmatched stability, comfort, and ease of adjustment. Up armoring the AirFrame™ with ballistic ear or face protection is as simple and fast (see our EARS™ and CHOPS™ for more info). All helmets and components are compatible with common ear pro systems like Peltors™ and Sordins™.Features
- Revolutionary vented shell design for passive cooling
- Covers more of wearer's nape than traditional designs
- Modular ear and face protection available
- Modular ARC-Rail™ system available (O2 compatible)
- Can be pre-drilled at factory for desired NVG mount.