Packed with mindful travel features, Patagonia's Black Hole Mini MLC 30L Backpack makes the airport a breeze. MLC stands for "Maximum Legal Carry-on" with 30-liter capacity and a versatile design that includes tuck-away shoulder straps, a grab loop on the back that can slip over the handle of rolling luggage for trolley transport, and a quick-stash padded hip belt that doubles as a shoulder strap—a system that lets us carry it as a backpack, briefcase, or duffle. The interior is also versatile with a slim compartment that separates our laptop and tech accessories from our clothes and a series of internal pockets that keep things organized..