The problem is that, like suspension if you want to soak up heavy landings you need a harder setting, but then for smaller bumps the suspension is too hard. An EPS made strong enough to absorb high impacts would also be too hard to absorb some of the smaller ones so a delicate balance is created to attempt to cater for the most common impacts.
The 6D helmet is created with not 1, but 2 EPS liners of different densities connected by a number of hour glass shaped rubber dampers. This creates an EPS liner which is capable of soaking up a far wider range of impacts of different severities.
Although the overall size of a 6D helmet is slightly larger than some other brands, the weight of this is hardly different to any high end helmet on the market. The outer shell of the 6D helmets are made out of the same quality materials such as carbon/kevlar and fiberglass so you know 6D have gone to every length to create the safest helmet possible.
The 6D comes in a wide size range from adult XS through to 2XL and a full range of kids sizes are also available. The 6D has received a 5 star MXA rating, MXA has only given 5 star ratings to two other helmets in the past 20 years, 6D is now the third.
Check out the full range of 6D helmets at MXstore and get the best protection possible for your head!