Solid bag for a variety of uses - Granite Gear Air Zippsack

I own the 16L, 12L and 9L Air Zippsacks. I find the top zipper makes access to them very convenient. I use the 16L sack as a stuff sack for my 45 degree Thermarest Vesper. It fits in the 16L just right so that it is not over-compressed but yet is a nice, compact size for my 30L pack. The 12L is a nice size of a puffy and the 9L is great for spare clothes. Because of their lightweight and packability when filled, these bags would also be a good choice for items you pack for flying. The overall quality of construction is very high.