Thank you for viewing! Inner lining The front side is fabric, The back side is made of bleached cotton. 2 pieces Not changeable. With mask elastic, I will thread the elastic and tie it before shipping. Reduced from 800 yen to 650 yen. How about it for a spare? Please see the photos for the size. I made it so you can use it as is, or thread the elastic through it. Please wash by hand or in a net at home. Please do not use a dryer, as it will damage the fabric! Shipping will be in an envelope via Yu-Packet Post Mini. The price includes shipping. This is a handmade item made by an amateur, so the stitches may not be even, or there may be some distortion. If you are concerned, please refrain from purchasing. If you are not concerned, thank you for your consideration.