Moleskine Metro Rolltop Custom Backpacks, Black Style Number:101233 001 Extra button included A low profile Extra button included it can easily handle a change of clothes breathable air mesh back and luggage trolley strap Volume: 30 liters (when the rolltop is fully opened) where you’ve been and where you’re going Roll top main compartment opening with adjustable belt and flat buckle closure Side coated zip pocket for easy access to the main compartment Front pocket with heat sealed zipper closure Sternum strap with adjustable length and height and emergency whistle Secure zip pocket on side of laptop compartment My Moleskine notes pocket to store ideas Inner padded compartment to separate your laptop from your personal belongings: fits devices up to 15'' Embossed honeycomb interior lining with reflective details Adjustable padded shoulder straps