Donal,

The CSC print says Multi-season copolymer

Water Temp here in the NW never get warm; about 54 degrees in the winter
colder in the summer as the ice in the mountains melts and feeds ice
water into the rivers

I chose Shark White color. It is a very ligth gray. What a beautiful
looking bottom! I'm sure I'll be able to see any Slime very easierly.
I'll keep you informed

OT