Ripstop nylon has heavier threads every few millimeters to help stop rips
from propagating in the fabric. Coated means that a coating (typically
urethane) has been added to stop air and/or water from passing through the
fabric. REI sells it.
-Bob Korves (former Pik-20d owner -- s/n 20589)
5K LAK-17a
5H Duo Discus

wrote in message
oups.com...
Hi Bob,
The size is not a problem, because the seal consists of many smaller
pieces.
What does it mean "coated ropstop" ?