Abstract: The present disclosure relates generally to breathing apparatuses where inhaled air and exhaled air are separated into different channels to permit a user to inhale fresh air. These devices can optionally filter inhaled air and exhaled air. These devices may include valves to help guide inhaled air and exhaled air to desired locations.

Abstract: The present disclosure relates generally to breathing apparatuses where inhaled air and exhaled air are separated into different channels to permit a user to inhale fresh air. These devices can optionally filter inhaled air and exhaled air. These devices may include valves to help guide inhaled air and exhaled air to desired locations.

Abstract: The present disclosure relates generally to respirators where inhaled air and exhaled air are separated into different channels to permit a user to always inhale fresh air. The respirators described herein can filter inhaled air, and optionally exhaled air.

Abstract: The present disclosure relates generally to respirators where inhaled air and exhaled air are separated into different channels to permit a user to always inhale fresh air. The respirators described herein can filter inhaled air, and optionally exhaled air.

Abstract: A mask includes a housing defining (1) an inner layer, an outer layer, and a volume in between, (2) a mouth aperture to be disposed about a mouth of a user, (3) a side aperture to allow fluid flow into and out of the housing, (4) an oral fluid pathway extending from the mouth aperture to the side aperture, and (5) a nasal aperture to be disposed adjacent to nostrils of the user. The mask also includes a nasal channel extending from the nasal aperture and to a nasal exit aperture. The housing is configured to route (1) fluid flow received at the mouth aperture distally through the oral fluid pathway, and (2) fluid flow received at the side aperture proximally through the oral fluid pathway. The nasal channel is configured to route fluid flow received at the nasal aperture distally through the nasal fluid pathway.

Abstract: A mask includes a housing defining (1) an inner layer, an outer layer, and a volume in between, (2) a mouth aperture to be disposed about a mouth of a user, (3) a side aperture to allow fluid flow into and out of the housing, (4) an oral fluid pathway extending from the mouth aperture to the side aperture, and (5) a nasal aperture to be disposed adjacent to nostrils of the user. The mask also includes a nasal channel extending from the nasal aperture and to a nasal exit aperture. The housing is configured to route (1) fluid flow received at the mouth aperture distally through the oral fluid pathway, and (2) fluid flow received at the side aperture proximally through the oral fluid pathway. The nasal channel is configured to route fluid flow received at the nasal aperture distally through the nasal fluid pathway.