Tim,
AHPC offer Kevlar as an option, glass is standard.
The options are either single kevlar or double kevlar.
My understanding is single Kevlar is the inner skin and double has Kevlar in both skins.
I have never heard of them having any problems....

Regards,
Phill

I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!