Hook On rack anchoring system, compatible with all types of rack. Made of a combination of materials that repel water. Inner section with zip and specific compartment for a bottle of water. Interior space for a laptop of up to 14, iPad, smartphone, house keys and pens. Waterproof rear Nordlicht LED light strip integrated into the backpack. It works with 2 AA batteries. USB cable to connect a Power Bank to the laptop. Specific pocket on one of the straps to store a transport card.