Please see the style drop down menu & reference the options below for purchase :) 1 Masks + 1 Filter 2 Masks + 2 Filters 10 Filters (no mask) 20 Filters (no mask) 40 Filters (no mask) 100 Filters (no mask) Original Design by Lucid Eye Studios Mask - Silky Polyester Outer layer, 100% Cotton Inner layer Filter - 5 Layers One Way Breathing Valve Adjustable Nose Clip Adjustable Ear Loops Double filtering: mask + filter, insert PM2.5 carbon filter from inside the mask, suitable for outdoors & indoors Activated carbon filter: filter fine dust & particles, breathable & skin-friendly, non-woven fabric can prevent moisture Masks can be washed repeatedly, filters are not washable. It is recommended that each filter can be used for 7 days of heavy use Please check size guide in listing photos before ordering. Ideal for small-Medium size adult face Wearing steps: 1. Stretch the mask away. 2. Insert the PM2.5 filter from the inside of the mask. 3. Cover your mouth & nose with mask & hang the rubber bands on your ears. 4. Adjust the nose clip to your nose shape. If you have any questions about our masks please contact us ,thank you ! Shipped from & sold in USA Manufactured in China Face Mask + Filter Pm 2.5, Poly Cotton Blend, Adjustable Elastic Earloops Metal Nose Clip, Re-Usable, Small, Medium Adult, Fast Shipping Usa