MetaMask Air Pollution Mask with Replaceable filterMetaMasks Air Pollution Mask with Replaceable filter in Leopard Motif REPLACEABLE FILTER means you can remove the filter and wash the mask when necessary. Package include 3 sets of nano filters one set of filter is already in place so you can start using as soon as you receive your mask. Fully re engineered with no compromise on quality. Unisex Adult MetaMasks features a proprietary Nano coco carbon matrix from New Zealand an extremely thin