We designed the 15-liter Sentrum daypack to handle all your office, classroom and daytrip needs. The Sentrum has a dedicated laptop sleeve between the main compartment and the padded back panel, as well as a smart internal organizer with a zippered pocket, two slip pockets and pen/pencil holders to help you keep your important items in order. It features a flat front pocket for quick access to the essentials, plus a mesh water bottle holder on the side. With your comfort in mind, the shoulder straps are EVA foam. You have the option of using the sternum strap for extra support or removing it completely for a cleaner look.