Off there website:
SADDLE CLOTH - A DuPont blend of materials makes it a quiet, storm proof, wind proof, and burr proof, the fabric is also breathable and won't fade.
BUCKSUEDE - just like Saddle Cloth stops wind, rain, and stickers too and is available in ASATS.
I would love to try that new Window camo in one of there pullover shirts. Pricey goods, but made in the U.S.A. and you could probably hand it down to your kids!