Easy and secure attachment to the bike rack thanks to the attachment hardware, with an optional strap around lower portion of bike rack if additional stability becomes necessary Converts easily into a backpack, simply unzip the back panel, flip it over, and rezip the back panel so that the backpack shoulder straps are outward facing Padded straps, ventilated ridge foam and robust support structure for comfortable carry While the bag is already weather-resistant, the additional rain cover provides protection from hard rain and visibility at night thanks to its all-over reflectivity