mfg=manufacturer.

The $50 question is up to you. If my helmet took a good shot, I'd replace it. Bike helmets accumulate damage over time since the foam compresses from each whack the helmet takes. They aren't for repetitive impacts.

You can't sit in a neurosurgeon's waiting room for $50.

Given our experience with the reality of severe TBI, we're really cautious with our helmets for both cycling and skiing and replace them on about a 3 year cycle. The helmets both age and accumulate damage over time.

J.