These masks have a polyster front, cotton back and a pocket in the middle for a filter. They have navy piping.
 
Youth Measurements: 10.5" from ear loop to ear loop, stretching to 15". The face covering is 4" high x 7" wide.
Adult Measurements: 12" from ear loop to ear loop and stretches to 17.5". The face cover is 5" x 7".