W. Watson wrote:

Well, this thread got a lot of good activity! I finally went to our local
paddle shop today, and asked them. The overwhelming helmet type carried by
them is made by Shredder. Any comments on them?

I don't have a horse in this race of plastic versus composite shell,
but rocks have hit my head hit many times, twice on the sides, so
I strongly recommend against any helmet without ear protection.
(Pictures of the Shred-Ready Shredder show top protection only.)