All Shotridge masks are two layers: 100% Polyester fabric on outside, 100% Cotton on inside. These masks are not intended to be a replacement for N95 or medical grade Personal Protective Equipment. Use supplied rubber grommets to tighten straps. Insert hooked end of crochet hook or paper clip through small hole in grommet. Pull strap back through grommet and adjust as necessary.
Each mask comes with two optional metal nose pieces, find the small slit on the upper right or left side, and slide the nose piece into the top of the mask and position it accordingly.