In reply to Graeme G:
Petzl did a little "in memoriam" on social media for the Ecrin Rocs a year or two ago - it was 10 years since they had last made one so they were all past their maximum life span. They were suggesting things to do with your old Ecrin Roc like plant flowers in it!
My mate has one of the foam Simond helmets, has used it loads, it seems to work fine - weighs not much more than a Petzl equivalent and cost a quarter of that! What's not to like?