Tube containers work well if the parachute is located in the back or hip area. They guarantee a clean deployment in the correct chosen direction. A tube container is a pocket where the parachute is correctly positioned. If the pilot pulls the parachute handle, it will deploy easily.
Tube containers are particularly desirable if pilots want a simple and uncomplicated harness. Additionally, the rescue chute is very well protected against moisture, dirt or external damage. Generally, tube containers are more aerodynamic than cloverleaf containers.