Pros rectangular shape so there is lots of space inside opens like a suitcase so it is easier to pack and to find things without fully unpacking two deep front pockets one for a 311 liquids bag one for wallet and phone while going through security slim padded laptop sleeve in the back that is as tall and wide as the whole pack deep bottle holder with expandable zipper sshaped back pack straps paddedventilated back panel sternum strap compression straps inside and outside s