I really don't know what the fabric "weight" is per say. It's not a real heavy fabric like canvas. The whole jacket maybe weighs a pound. The reason that I like it so much is because it really blocks the wind. More so when you cinch the bottom drawstring. The pocked on the chest is roomy enough for a billfold and sunglasses. Maybe 6" top to bottom and 5" right to left. If you can get this with one of Sierras awesome price reductions, it's a really great deal! Marmot does make a quality product. Hope this helps.