This bag is awesome. I commute with it everyday on my bike at least ten miles each way. Holds everything I could want and more, Awesome separate computer area with zip away fold out flap for airports(super bad ass) that also holds iPad is its own velcro pouch. The inner compartment is huge, there is a separate smaller compartment within for book,calendar, journal whatever. There and a bunch of pockets inside and out for pens and the like. Bottom zip open pocket for cords and cables or rain coat, secret pocket behind front zippered pockets. Fasten or velcro flap (I use the fastener and strap to hold my yoga mat and just velcro it) to close. Get one. Today.