I did my helmet research and afterwards I got Shane from WRV to order me the Duane Peters lifer model. Not only because it was cool looking but it was certified and tested. There is another skater where I live that has had many concussions because he is not wearing the proper gear (he did take big slams too). I did not want to have one much less any. I like how the lifer is tested and certified to lessen the impact of the slams I might take riding the bowl and vert.