Handy man or woman

For a woman, it's very convenient: handbag, etc .. giving rigidity to your bag, to avoid losing everything in the interior, also used as a separator.

For a man in a backpack offers storage cords, headphones, etc .. without that piles up in the background, even in a back pocket a single bag.

The pros: stiffness, price, range size. Check carefully before you buy.
The -: A too thick border, too much loss compared to the rest of the surface, and sometimes a little visible.