Buy the Extra heavy duty garbage bags, crunch up the top and stick your vac hose in there. suck out all the air, hold tight to the top and slowly pull the hose out and twist the top really tight. Put a twist tie on, very tightly. This will hold as good as the costly bags do. My DH and DS were amazed when I showed them this when he was moving. I had to ship a quilt to my dad and it was big. So I folded it up so the shape was the shape of the box, I put it in one of those trash bags, sucked out the air, fit it in the box, sealed it tight and shipped it out to him! Works like a charm. It is AMAZING how much air space there is is stuff.