Describe something in four to six sentences

1. Its color is black and a bit tattered here and there because of its old age of usage, but I bet it will be strong enough for some gruesome treats for the next two years or so - who knows how clumsy I can be.
2. Its zippers are as good as its design for pockets as they can hold stuff safely inside in case unzipped - unless it gets a hole on it.
3. It's small but able to carry things just fine, not to mention snug perfectly on my back thanks to its comfortable length and width of straps thus small chance to ever put a strain on my shoulders.
4. It's so much like every day's bag kind of style, made from leathers, but not quite looked like it, and has a waterproof quality from my own experiences.
5. It's a pain sometimes and needs quite an effort to get it because the truth is: the bag isn't mine alone to begin with.
6. But no matter because I'm good with jan-ken-pon, but put that aside, I think I can use it too together with my sister because the bag was my father's present for... the two of us.