A newer type of airbag application is the knee bag or knee boster. This airbag deploys from underneath the dashboard and is intended for occupants in the front seats in the event of a frontal-type crash event. Kneebags are intended to provide additional support to driver and passenger airbags and to prevent front occupants from « sub-marining » under the dashboard column and injuring their lower extremities. Zodiac manufactures kneebags which are installed in some Rolls-Royce, PSA, and BMW vehicles.