KN95 Mask (1 Box). McCons KN95 anti pollution face mask online in Bangladesh from Cellsii.com. If you are looking for top quality and affordable KN95 mask, then this McCons KN95 mask is the best choice for you. This mask is made with 5 layers that effectively prevent PM2.5 particles. It helps to keep safe with filters out dust, bacteria, smoke & pollen.