The high efficient engines and extensive use of composite materials, like the wide-body Boeing 787 Dreamliner and Airbus A350 XWB, contribute together to the 12–15% better cash operating costs. Bombardier claimed at the time that the engine and the wings would save up to 20% fuel, a 25% reduction in maintenance costs and four-fold reduction in the noise footprint compared with the Airbus A320neo and the Boeing 737NG with which it competed. The larger CS300 (now A220-300), was 6 tonnes lighter than the Airbus A319neo and nearly 8 tons lighter than the Boeing 737 MAX 7, helping it to achieve up to 12% operating costs savings and 15% with the current models.