Originally Posted by MikeMike
On a more serious note, I think if you google ,"traveler steel mesh security net" you will find what you are looking for.
I have one of those, called a Pac-safe. it works very well with a big duffel inside & I carry very little in it! when I get someplace to do some real walking around, like an Museum boots & tank bag & helmet go in duffel, draw string/cable sucks up nice & said draw cable goes through pants & jacket like trice said and back to Bike...
works really well..