These face masks are essentially made up of 2 layers. The top layer is a high quality stretch fabric covered with holographic sequins. The linging material is an open cel 1/8" foam/mesh to make breathing easier while still providing a barrier to incoming/outgoing air pollutants. ( see photo )
There is also soft 1/8" elastic with an adujuster for better fit used to go around the ears. ( see photo )
Please be aware that they are not as effective as the N95 version in filtering out contagions and should not be considered a replacement. However, they are likely to be more effective than just fabric.
These masks are made one size fits all but there is a top and bottom to fit face more accurately. The small seam is on the top for the nose and the longer seam is on the bottom to accommodate the chin. I've also placed the logo on the left side of all of them to help distinguish top/bottom.
The masks can be washed repeatedly by machine with warm/cold water or by hand, placed in dryer on low setting or left to air dry.