In 1998 the best-selling sedan in Volvo's North American model line got a new interior and the name was changed to S70. Although Volvos were once seen as safe if somewhat stodgy, the S70's predecessor, the 850, was widely praised for its spirited performance and handling; traits that were enhanced in the new model. The look of the S70 continued another change in direction for Volvo more rounded styling. Something that hasn't changed is Volvo's commitment to occupant protection, as evidenced by its Side Impact Protection System, which supplements frontal airbags and improved seat belt pretensioners with side-impact airbags. For 2001, Volvo redesigned its mid-level sedan, giving it the new name of S60 and building it on a variant of the S80 platform