The combined Quattro Solo with occupant restraint.
Unwin recommends the use of a 3 point occupant restraint system to provide greater protection in case of an impact. However we also recognise that some vehicle layout/designs or specific postural or medical conditions do not allow that style of seatbelts to be used easily. This system is not ISO 10542 compliant if used in 2 point configuration.
All the Quattro systems have been dynamically tested to sustain a wheelchair weight of up to 120kg, and therefore becoming more compatible to a wider range of wheelchair designs.