Based on the wildly popular Resp-O-Rator™, the pocket-sized Resp-O-Rator™ Junior weighs less than 1 oz., yet the super efficient 2-sided HEPA filter strains out 97% of particles down to 0.3 microns. Whether you have a beard, mustache, or are clean-shaven, it's still one of the most cost effective and fool-proof ways to seal out airborne dust, pollen and other super fine particles. Will not fog up or interfere with glasses or safety goggles. With over 97% efficiency, and over 22 sq. inches of filter area, the Junior model is best in less strenuous and lighter duty applications (we recommend the full-size Resp-O-Rator™ for more demanding situations). Great for allergy sufferers exposed to fine dust or pollen while cleaning, crafting, or doing yard work. Includes mouthpiece, filter, and tethered nose clip. Made in USA.