Best (inexpensive) portable 'block' target?

[Gdpolk]

Originally posted by longrifle346:
My granny always said poor people have poor ways! I use a feed bag stuffed with throw-away clothes the kids have outgrown. They don't make a better field point target. When you finally shoot the bag up just slip on a new one.

I do this also.  I've put old clothes in boxes and paper shopping bags before for a portable solution when traveling.  Recently my backpack got a busted zipper and it's become my favorite target bag of all thus far when filled with old clothes.  It has a carry handle and shoulder straps built right it!  Sometimes I take it out to the woods just to have something softer than a stump to remove arrows from.