Love this product for multiple ways it can be used.  Also so light and unobtrusive.  One concern is the durability of the zipper.  One time my kitty was able to force nudge open at the zipper seam when I put the bag down for a few minutes.  Not get it to unzip, but unravel - literally force open.  It is worrisome that if she really wants to get out she can, and that I can lose her...  Otherwise no complaint.