If the weather permits I take the bicycle into (5 km) office. Since I take very little and on the mountain had no porter, disturbs the backpack previously used and in addition is when picking up speed even the sweaty backs. For the daily office essentials this bag is perfect. It fits in a lunchbox, a wallet, a cell phone, a keychain and a small bag with patches and emergency matters. Positives: - Lots Of Space - Expandable with zipper - Incredibly cheap (in comparison with other bags)
Negatives: - Not waterproof - Concealed possibly the taillight The negative points I have resolved as follows: The rear light was mounted on the strut to the rear hub. In addition, I take with a 3-liter freezer bag, and pack the stuff into it - so the mobile phone and the wallet is protected waterproof even in the rain. For this reason, full 5 stars.