The parachute package is called "rig". It consists of backpack, harness and canopy. The backpack is the container in which the parachute is stored, and which opens up when the parachute is deployed. The harness is the strapping on which the backpack is attached to the jumper. Modern harnesses have leg straps, vertical (upwards) straps and chest strap which can be tightened snug. The fabric part of the parachute is called "canopy". It is attached to the harness by lines, which themselves attach to four straps called "risers". The canopy may be round, bell-like, resembling like a jellyfish, or the canopy may be a mattress-like, resembling a wing profile. Most army parachutes are bell parachutes, while most recreational, rescue and professional parachutes are wing parachutes.