The increased comfort is based on three factors: 3D Body scans are used to adapt the seat shell to real body shapes, and the back is supported even better as the body position in the harness has been shifted slightly forwards. The cushion effect created by the supportive back foam rounds off the concept.

The Closure Remember System (CRS) has been revised and optimised for easier handling. The small number of steps required to close the speedbag minimise the risk of forgetting to close the main strap before take-off. In addition, the buckles are now anodised red, making them even more visible for pre-take-off checks.

The back compartment capacity is 22.5 litres, 35% more volume than the LIGHTNESS 3, while the storage compartment under the seat holds a further 6.5 litres. There is also a new 8 litre space in the speedbag nose.

The new cockpit offers plenty of storage space and easy handling. The contents are easy to reach in flight thanks to magnetic fasteners and it can be packed small. The removable cockpit panel offers sufficient space and securing options for electronics. The LIGHTNESS 4 is also supplied with a windshield and hook knife.