ePac02? What sets the ePac? apart from the other laptop backpacks is its patent-pending side-loading laptop compartment This exclusive compartment for your laptop has 4 foam padded walls and a super thick 2" foam floor to protect your laptop in case of a vertical drop It comes with a 3 digit combination lock for the times when extra security is necessary Luxurious comfort is provided by the combination of S-shaped shoulder straps working in tandem with a heavily padded Air-Mesh foam backside with a unique Velvet covered lumbar support The importance of a comfortable backpack can not be stressed enough, as students are carrying more and more books, it is imperative that the backpack be very comfortable The ePac?, with all its features, will deliver a supreme level of comfort