All fabric used is a soft cotton/poly blend.  Washable and reusable.  All masks have a metal nosepiece sewn in to create a tighter fit around your nose and across your cheeks. The ear loops are adjustable, so you could freely change its length according to your face contour.  All masks, except Straw Masks and Window Masks, have a pouch for a filter.  The Straw Mask is available in Duckbill style only with a closeable "flap" when not using straw.  
 
Kids' Small/Medium - From 4 to 7 years old (one size)
Kids' Large - 8-12 years old (one size)
 
Adult Small - Smaller than average-size teenager or woman.
Adult Medium - Average-size woman or teenager
Adult Large - Average-size man or a woman with generous head size.
Adult Extra Large - Man or woman with generous head size, or man with an abundance of facial hair.
 
 
This mask does not have medical certification and is designed to form a first barrier of protection to minimize droplet projections as well as hand/mouth contact. Stay safe and wear in good health!