A vehicle airbag system comprising an airbag. The airbag may include at least one tether attached to first and second walls of the airbag, wherein each tether includes a tear seam configured to detach when the airbag is inflated with a pressure higher than a predetermined pressure. The airbag may include at least a first tether and a second tether, each tether attached to first and second walls of the airbag, wherein the first tether includes a tear seam configured to detach when the airbag is inflated with a pressure higher than a predetermined pressure. The system may further comprise a controller that may be used for determining whether to inflate an airbag with one of a high pressure and a low pressure depending on whether a detected impact is oblique.