We are supplier of the cotton mask, our mask is reusable, washable and breathable, it has 3 plys with short plush fabric, melt-blown and cotton fabric. For this product,originally it's the pm 2.5 anti dust masks but during this hard time,we changed the inner material into melt-blown fabric ,which has high-efficient filter protective function,same as other n95 masks do.We did the waterproof testing and burning testing about this fabric, the results show that our melt-blown fabric is high density and pure,so it also can protect us from infecting the  . when you get the mask,you also can check the quality and fliter efficiency of this mask.There are 6 colors of adult kids and two colors of children style. We also have carbon filter and non-woven filter to sell, it can add into the middle of the mask. Considering not harm the kids' soft skin,we add elastic loop with Velcro strip,which is more comfortable when kids wear. Any more questions pls feel free to contact with us.