In a couple of Lexus firsts, the fifth-generation LS is the first Lexus sedan to feature a six-sided window design, while the flush-surface windows integrate smoothly with the pillars. In the company's efforts to reconcile two conflicting goals, sufficient headroom with a low roofline, the new LS employs an available outer-slide-type panoramic moonroof instead of the conventional, internally retracting item.[48]