Just made this bag with this retro chic fabric.
Back side with a zipper opening and a small pocket with a flap.
Zipper opens both way and is hidden with a flap.
It opens wide like this so it's really easy to pack and unpack.
I've added an additional front pocket here
for smart phones.
I've used velcro instead of zipper to avoid scratching the phones.
You can hold the top strap to use like a tote,
make the strap short and use it as a shoulder bag,
or make the strap long and pull from both sides to use it as a back pack,
or sling it on your back,
or sling it to your side to make it a messenger bag.