Check this out:
I Bought one of these closed cell pads. Shipped fast. Did'nt weigh it, but very light. Dense closed cell foam.
SIZE IS 1/2" X 54" X 70". The seller has been listing it in several catagories. The ccf I received was a dark grey.
Was going to weigh it at the Post Office, but scales here give postage only(oz and gr options are disabled).