It may be a little odd to think of an underarmoured backpack as a purse but the same basic elements can be found in a backpack as well.
When you are out and about the most you will need to carry with you are a few things.
It should be a backpack that you can carry, but not too large, you should be able to use a key or a pocket for extra pockets, and a small, portable pocket for your phone.
These basic items will be easy to find on the streets of cities like New York and London.
But you can also find a backpack in a city like London that you may never even notice is there, with a small pouch or bag to carry your phone and a backpack to carry whatever you need.
You can find some useful information on womens underarmours in this blogpost by The New Scientist’s Katherine Houghton, which focuses on underarmouring and the role of women in society.