This helmets created for the Russian Army, but used by some special force. They provide medium protection, but in the same time they are light and do not restrict movement.
This Helmets mainly created for Russian Speops operators. That's why their price higher, than army one. Main difference on this helmets in shape, Suspension System and some of them have RIS rails for additional equipment, like flashlights or laser.
Jumping Helmets & Shlemophones
Here you can find Jumping helmet. They are usually used by Russian Paratroopers (VDV), to protect ears from wind and cold. Each VDV unit use them each fly. Very warm and nice, they will works on Airsoft too.
Shlemophones created for Tank Units and provide protection from impact and usually have radiosets.