Code Zero is a class of cloth from Dimension-Polyant GmbH (and
other manufacturers) and advertised for use in Spinnakers. See here:
http://www.dimension-polyant.com/en/Spinnaker_2_6_1.php.  Moyes
advertises a version of Code Zero as an option to PX 05.
http://moyes.com.au/products/hang-gliders/litespeed-rs.

http://www.bainbridgeint.com/Item.aspx?Item=PRD-900020&PartNo=F6006Z00M

http://www.dimension-polyant.com/en/pdf/DP_Code_Zero_E.pdf

It has been reported that there are delamination problems with some Moyes sails.
For example, as I published earlier:

Raul Guerra writes on Facebook:

I don't know about Technora, but I only hope this doesn't happen
with the new sail material:

I bought a Litespeed RS 3,5 and this happened. Later I bought a Litespeed RX 3,5
and the same thing happened. I spoke with Mike Barber and he showed me that it
happened at Wallaby, too. When I asked Kraig Coomber he told me with my RS it
was a manufacturing defect in the fabric and that it would not happen with my
new RX, but it did. Anyway, I love my Moyes RS and RX, my Matrix harness and I
want this new sail material, also.

Glen McFarlane wrote:

The bottom line Gerolf is that the code zero and I can only say
from my experience from having it on a glider is that it did not last long
before delaminating very quickly. Technora is over twice the price per m2 of
code zero and its great to see that you are now the last manufacturer developing
it into their high performance gliders. The bar just keeps rising.

I saw other examples of delamination of Steve Blenkisop's sail,
and on other Moyes RS sails. I don't know if the material was PX 05 or Code
Zero.