The Nebula 34 is full of loads of useful features for the active commuter or student. It has a quick to access laptop sleeve that will easily accommodate a 15.4 laptop, so you dont have to faff with prying your laptop out from amongst all your files & books, & there are handy organiser pockets within the bag to keep all your cables & USB (Universal Serial Bus) sticks safe. This bag has more sleeves than your shirts; so as well as the padded laptop sleeve there is also an internal tablet sleeve & document sleeve. For all your other things you want to keep quick to had the is also a front zip organiser pocket, this has lots of spaces for pens & other thing such as key & music players. On the outside of this pocket there is a stretchy front pouch with a buckle closers for you to stuff your coat in or other items such as todays paper. If you like to cycle to work there is a removable waist belt, this helps keep the bag close to your body & a sternum strap to stop the comfy shoulder straps moving around & slipping off your shoulders. The reflective graphics will help you to be seen but just to make sure there is a handy bike light attachment loop for when the days get shorter & the nights get longer. & as this is Osprey we are talking about, they have popped on a safety whistle. So if you do decide to take this out on the hill you can signal for help if you get into a spot of bother; its pretty useful in the city too if you come across someone who is after your wallet. Padded laptop sleeve Internal tablet sleeve Sternum strap with emergency whistle Zippered panel access Zippered scratch-free sunglasses & electronics pocket Stretch front pocket Reflective graphics Front panel organiser pocket Grab handles Internal document sleeve Internal key attachment clip Internal organisation pocket LED bike light attachment point Removable webbing hip belt Side compression straps Stretch mesh side pockets