one size fits most perfectly
I was initially worried about getting another "one size" helmet, as previous experience left a lot to be desired, with their awkwardly oversized shells and wonky fits. However, because my 58cm head was always between a Medium, and a Large in most brands, but right in the middle of the K10 spectrum, I gave it a try, and have been extremely pleased. Shell is just the right size, and manages somehow to both sit low on my head and neck, and stay low profile on the sides as well. The Up/Down adjuster should be an industry standard, and coupled with the gel padding, ensures the helmet stays perfectly in place no matter what shenanigans you put your head through. Also, the faux leather chin straps are a very nice, and surprisingly comfortable touch. It's clear that Kask is more about providing a 'total package' helmet with amazing Italian styling (100% made in Italy too!) at every level of the piece. This is the PRO level Kask helmet you're looking for, if coughing up 3 bills bills for the Vertigo would be the last straw that finalizes a divorce from your spouse.