Article of luggage comprising: a luggage main body having a bottom surface and a cavity formed to receive articles for packing; an expansion body having a perimeter defining a cavity; a foldable gusset joining the luggage main body to the expansion body, the foldable gusset allowing the expansion body to move away and towards the luggage main body to vary a size of a volume formed by the cavity of the luggage main body and the cavity of the expansion body; an openable cover attached to the expansion body, wherein an expansion and locking device is disposed internally at opposite ends of the article of luggage, the expansion and locking device being configured to allow free movement of the expansion body in a compression direction towards the luggage main body and configured to allow locking movement of the expansion body in an expanding direction away from the luggage main body, wherein the expansion and locking device is a ratcheting assembly comprising: a set of parallel teeth affixed to one of the luggage main body or the expansion body; a holding assembly main body affixed to the other of the luggage main body or the expansion body; and a latch structure coupled to the holding assembly main body by a biasing member, the latch structure having disposed on its underside a pawl, the pawl configured to engage and disengage from the set of parallel teeth, the biasing member configured to maintain the pawl in an engaged state with the parallel teeth in the absence of an actuating force applied normal to the surface of the latch structure. a luggage main body having a bottom surface and a cavity formed to receive articles for packing; an expansion body having a perimeter defining a cavity; a foldable gusset joining the luggage main body to the expansion body, the foldable gusset allowing the expansion body to move away and towards the luggage main body to vary a size of a volume formed by the cavity of the luggage main body and the cavity of the expansion body; an openable cover attached to the expansion body, wherein an expansion and locking device is disposed internally at opposite ends of the article of luggage, the expansion and locking device being configured to allow free movement of the expansion body in a compression direction towards the luggage main body and configured to allow locking movement of the expansion body in an expanding direction away from the luggage main body, wherein the expansion and locking device is a ratcheting assembly comprising: a set of parallel teeth affixed to one of the luggage main body or the expansion body; a holding assembly main body affixed to the other of the luggage main body or the expansion body; and a latch structure coupled to the holding assembly main body by a biasing member, the latch structure having disposed on its underside a pawl, the pawl configured to engage and disengage from the set of parallel teeth, the biasing member configured to maintain the pawl in an engaged state with the parallel teeth in the absence of an actuating force applied normal to the surface of the latch structure. a set of parallel teeth affixed to one of the luggage main body or the expansion body; a holding assembly main body affixed to the other of the luggage main body or the expansion body; and a latch structure coupled to the holding assembly main body by a biasing member, the latch structure having disposed on its underside a pawl, the pawl configured to engage and disengage from the set of parallel teeth, the biasing member configured to maintain the pawl in an engaged state with the parallel teeth in the absence of an actuating force applied normal to the surface of the latch structure.