Paratex Micro Fabric is tough, lightweight, highly windproof, and water repellent. The heavy-duty closely constructed fabric is very hard wearing but still remains soft to the touch and surprisingly quiet. It is the ideal outer casing for sleeping bags and jackets where durability is an absolute must.
The Shepherd's 2 cents:
I own a couple of products with the Paratex Micro Fabric and love it. Perhaps the best feature for me is the wind resistance. I can get away with a much lighter layer scheme when using my Snugpak Jacket.