Hmmmm .....
My Vertex 300s are, besides being a very specific size, made of nylon
The material feels like some kind of tent material or rain coat - make sense ? Bah, not raincoat either
OK, not tarp material like an old tent, but more like a bomber jacket ??
Bah, I can't describe it .... I'm not a girl
I've seen summer jackets made of this material