This bicycle saddle bag is great for commuting and light few days touring when you sleep in your friends homes or hostels.
1. Pull out backpack shoulder straps and loop bottom straps so they don't fly around when i ride..
2.Put small carabiner and keyring to hook bag.
3.Cut piece of plastic and put inside bag to stay flat on rack.
4.Put all my stuff inside (those are all stuff that i carry with me on weekend bicycle trip, inside red bottle are my tools, in blue bag is my rain jacket, in yellow my reflective vest, and in little black bag is my lights for night riding )
5.I hook bag trough saddle rails and around rear rack with strips.