We got these bags for a Thule cargo box to keep all of our stuff isolated and separate.  They fit the carrier perfectly and we can fit 3 of them in there.  Zipper opens at the top and goes all the lway on both sides left and right so it makes it easy to pack things.  The only thing I don't like is that there's no support to any of the sides of the product making it so flexible that you have to really pack everything tight or things just fall all over the place.  But for what we wanted it 4 it serves its purpose wonderfully.