A nose bridge strip having a scent-releasing mechanism can be included in a mask structure and includes a main body and at least one scent-releasing element. The main body is in a shape of a strip and can be combined with the scent-releasing element. The scent-releasing element can produce scent molecules capable of reacting with olfactory cells in a nasal cavity such that bioelectric waves are generated and propagate to the brain. The mask structure includes the nose bridge strip and a mask body that can be arranged with the nose bridge strip. When the mask body is worn on a human face, the nose bridge strip can be pressed and deformed compliantly against the nose bridge so that a user wearing the mask structure can smell a pleasant scent while breathing and feel comfortable.

A nose bridge strip having a scent-releasing mechanism can be included in a mask structure and includes a main body and at least one scent-releasing element. The main body is in a shape of a strip and can be combined with the scent-releasing element. The scent-releasing element can produce scent molecules capable of reacting with olfactory cells in a nasal cavity such that bioelectric waves are generated and propagate to the brain. The mask structure includes the nose bridge strip and a mask body that can be arranged with the nose bridge strip. When the mask body is worn on a human face, the nose bridge strip can be pressed and deformed compliantly against the nose bridge so that a user wearing the mask structure can smell a pleasant scent while breathing and feel comfortable.

A breathing filter assembly for filtering breathing air includes a breathing unit that includes a mouthpiece that can be placed in a user's mouth. The breathing unit includes a pair of nose tubes that can each be positioned in a respective one of the user's nostrils when the mouthpiece is positioned in the user's mouth. A filter is removably insertable into the breathing unit. The filter is comprised of an air permeable material to pass air therethrough for breathing. The filter extends into the mouthpiece and each of the nose tubes to filter air inhaled through the user's mouth or the user's nose.

In an example, a respirator includes a respirator body having a distal portion and a proximal portion, the distal portion including a filter housing wall and an open distal end. The proximal portion includes a facial interface which is compliant and deformable from an undeformed state to a deformed state to conform to a facial contour of an individual. One or more filter frames are inserted into the distal portion and supported by the filter housing wall to separate filter media on opposite sides of at least one of the one or more filter frames. A filter cover is releasably attached to the open distal end to enclose the one or more filter frames and filter media, forming a filter housing. The one or more filter frames are removable from the distal portion and replaced into the distal portion to allow replacement of the filter media.

An intranasal cannula apparatus for use to filter air that enters a nasal cavity of a user is provided. The apparatus includes a pair of elongated bodies coupled together and designed to insert in the nasal cavity of the user. Each elongated body has a front portion, a rear portion, a top portion, a bottom portion and side portions that form an internal cavity therein. Each elongated body has a nasal opening disposed on the bottom portion of the elongated body that aligns with one of the nostrils of the user. A dorsal opening is disposed on the top portion of each elongated body. A pair of filters is disposed within the pair of elongated bodies. The apparatus is designed to permit air from the nostrils of the user to pass entirely through the nasal openings and dorsal openings in the elongated bodies to the nasal cavity of the user.

The headgear includes a head piece with a front opening and a bottom opening fringed with a first strap. Two flat ear pieces are provided respectively and oppositely on two lateral sides of the head piece, each having an outward extended hook element. An eye piece and a mouth piece respectively seal an upper portion and a lower portion of the front opening. An upper rim of the mouth piece is joined to a lower rim of the eye piece. Two second straps run around the head piece, where two ends of an upper one and a lower one respectively join the four corners of the mouth piece. A sound amplifier is fixed to the mouth piece to facilitate wearer's verbal communication. The head piece may be made of PE for reducing cost and discomfort. An addition mask may be fastened to the ear pieces to enhance protection.

The headgear includes a head piece with a front opening and a bottom opening fringed with a first strap. Two flat ear pieces are provided respectively and oppositely on two lateral sides of the head piece, each having an outward extended hook element. An eye piece and a mouth piece respectively seal an upper portion and a lower portion of the front opening. An upper rim of the mouth piece is joined to a lower rim of the eye piece. Two second straps run around the head piece, where two ends of an upper one and a lower one respectively join the four corners of the mouth piece. A sound amplifier is fixed to the mouth piece to facilitate wearer's verbal communication. The head piece may be made of PE for reducing cost and discomfort. An addition mask may be fastened to the ear pieces to enhance protection.

A mouthpiece, the mouthpiece is made of a conformable material and has a breathing cavity extending there through. The mouthpiece has a pair of teeth slots for holding the mouthpiece between teeth and an ergonomic shape that seals with lips. The mouthpiece is a connector that allows for easy attachment of a breathing tube. The mouthpiece can be combined with various tubes, valves and filters to create a variety of breathing systems.

According to some embodiments, a protective face mask to protect medical personnel by filtering exhaled air of infectious patients is disclosed. The protective face mask comprises a first layer, a second layer and a third layer. The second layer comprises a molecular sieve desiccant. The molecular sieve desiccant is between 0.1 cm and 10 cm thick.

A method of providing a virus and other pathogen protection for a person comprising providing a mask in which incoming air must pass across multiple surfaces constructed of multiple layers of a sticky material with a circuitous path to capture any airborne viruses and other pathogens irrespective of their size with the outgoing air taking a different path than the incoming air to prevent breathing moisture from interfering with the sticky capture and including a mouthpiece to prevent mask leakages.