Paratex Light Fabric is tough, lightweight, highly windproof, and water repellent. It is not as durable as its big brother, but what it gives up in durability it more than makes up for in being light weight. Paratex Light Fabric is ideal for sleeping bag linings and mid layer insulated clothing.
The Shepherd's 2 cents:
I own a couple of products with the Paratex 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.