We use U.S. - made <i>high tenacity</i> 1050 denier ballistic nylon on many of our bags. It's harder to get and significantly more expensive than the Chinese or Thai 1680 ballistic used by our competitors. In spite of the larger size of the yarn, the 1680 is not nearly as durable as the 1050 fabric.
(One company erroneously claimed that their 1680 ballistic was of course better than Tom Bihn's 1050 fabric: bigger is better, they figured. They figured wrong, as the test results show.)