Bulls One introduced the new PM 2.5 ultra-fine dust high-efficiency filter as a product with both reasonable prices along better performance. The company also adds that it provides a cooler as well as a more comfortable indoor environment by applying fabric with about 15% better ventilation compared to existing products. https://www.coherentmarketinsights.com/news/bulls-one-announced-the-launch-of-a-new-pm25-ultra-fine-dust-high-efficiency-filter-1433