The first one is made from a painting drop cloth. This product is hard to come by here since most are plastic. This "fabric" is so versatile. - I love it!
The second one took me the longest but then it has a zipper across the top, an outside pocket with a flap and several pockets in the interior. I made it from a panel that I didn't know what to do with.
The third one is made from a remnant that I picked up in a thrift store - the colour doesn't show up well but it is a light brown tweed. This remnant was 50 cents for an approximate meter (yard).
The fourth one is made from part of the leg of a pair of jeans - that part with the pocket. ;) I deliberately left the edges ragged.
All the bags are lined.
I use all of these but the denim one is used most often .... I like to travel light.