I bought this bag to wear under my graduation robe so I could store my phone, wallet, and keys.  It's slim enough that no one noticed under the robe and held my iPhone plus and wallet well.  There are lots of little pockets to help you store smaller things and now I take it everywhere I don't want to take my larger purse.  The only downside is it is a little cramped inside, I had a hard time fitting more than my phone, wallet, and keys.  But if you're just looking to carry the essentials and not be weighed down, it works well.