Chamber adjustable stiffness airbag

An airbag apparatus comprising:

• a plurality of fabric panels cut and sewn together to form the airbag having an outside and an inside, the outside having a predetermined shape and the inside having a plurality of chambers adapted to receive an inflation gas whereby the apparatus is transitioned from an uninflated state to an inflated state;
• a first chamber disposed inside the airbag, upon receiving a first predetermined volume of the inflation gas, having a first capacity to resist a first load applied to a first area on the outside of the airbag coincident with the first chamber;
• a one or more vent communicative with the first chamber configured to selectively release the first predetermined volume of the inflation gas in response to the first load;
• and
• a second chamber disposed inside the airbag and below the first chamber, and not in fluid communication with the first chamber, upon receiving a second predetermined volume of the inflation gas, having a second capacity to resist a second load applied to a second area on the outside of the airbag coincident with the second chamber;
• where, upon transitioning into the inflated state, the first chamber is disposed above the second chamber and the first capacity is less than the second capacity, whereby the first chamber is adapted for HIC reduction and the second chamber is adapted to Nij reduction.