To what standard is it rated? I've been thinking about this one too, but haven't been able to find a rating.
Here is some info copied directly from one of the websites that sells the exact helmet i purchased
2012 Suomy MR Jump Motocross Helmet - Monster Replica
Features:
Completely removable and washable cheek pads are available in different thicknesses for complete customization of the final product.
Completely removable and washable internal shell is available in different thicknesses for complete customization of the final product.
The removable internal shell has been ergonomically designed for a uniform and controlled fit of the entire head. The visible aeration slots ensure that incoming air thermo-regulates the inside of the helmet and that the flow of hot air is easily discharged from the rear.
The internal elements (cheek pads and internal shell) are made entirely of COOLMAX® ACTIVE fabric with INTERPOWER treatment:
Wicks sweat away from the body;
Keeps the user fresh, dry and comfortable;
Lightweight, soft and breathable fabric;
Performance verified and certified by ADVANSA.
Ventilation:
Polystyrene, with grooves to direct the incoming air flow.
Air intakes (front, upper and rear) that control the helmet’s internal ventilation.
Chin-guard air intake to control the helmet’s front ventilation.
Aerodynamics:
External shell besides the aesthetics aspect, have veins that carry the air flow from the front to the back of the helmet
Peaks have the lowest aerodynamic impact possible.
Chin-guard air intake to control the helmet’s front ventilation.
Safety:
For maximum safety MR JUMP must fit tightly and be correctly and securely fastened, so it cannot be taken off neither by pulling it nor by rotating it around the head.
If it is too big it may slide down over the eyes or turn in a lateral direction due to movement during riding, thus blocking visibility.
Shell available in two sizes (M, L), and handmade in Italy. The new composite material is combination of carbon and aramidic fibre.
Internal polystyrene protective liner, available in two sizes (M and L). The special shape and construction featuring differentiated density increases mechanical resistance in the event of accidental shocks.
The particular shape of the interior shell, was studied so as to reduce impact angles with the rider’s body while permiting the use of most of the modern Neck Braces.
The D-RING retention system is designed and patented by Suomy: this reliable and tested double D ring system ensures stability, safety and resistance.
Standards:
ECE 22-05 Europe
DOT America and Canada
QAS Australia and New Zeland
JIS Japan
INMETRO NBR 7471 Brasil