Abstract: Aspects of the present disclosure are directed to air filtering components and related methods. As may be implemented in accordance with one or more embodiments, an apparatus includes a filter frame having an outer perimeter and configured to hold at least one filter within the outer perimeter, and a fastener configured to selectively couple and decouple the filter frame to an air passageway of an air movement component. The fastener is further configured with the filter frame to seal the outer perimeter around an opening in the air passageway via which air may flow by engaging with the air passageway and applying a force to the filter frame in a direction toward the air movement component, therein forming a sealed air flow channel through the filter frame and the at least one filter held within the outer perimeter.

Abstract: Aspects of the present disclosure are directed masks and enhancing the sealing of masks to user's faces for a variety of different types of users and under a variety of conditions. As may be implemented in accordance with one or more embodiments, a mask apparatus has a filter, a shell operable to seal the filter to a user's face around the user's nose and mouth, and an interface that facilitates the sealing. The interface may, for example, include protrusions that are operable to extend between user facial hair, improving the scaling of the mask to the user's face.

Abstract: Aspects of various embodiments herein may be implemented as follows. An apparatus has a material shell that conforms to a user's face, and a securing portion connected to the shell that may operate to secure a filter to the user's face with the filter covering the user's nose and mouth. A securing force may be applied to the filter via the first material portion in a direction toward the user's face, thereby sealing the filter around the user's nose and mouth. Various implementations involve elastic and other material that facilitate sealing of the filter around the user's nose and mouth.

Abstract: Aspects of various embodiments herein may be implemented as follows. An apparatus has a material shell, which may be conformed to a user's face, and a securing portion connected to the shell that may operate to secure a filter, such as to the user's face with the filter covering the user's nose and mouth. An adjustable valve is coupled to the filter and operable for providing adjustable air flow through the valve (e.g., selectively bypassing air flow through material of the filter). A securing force can be applied to the material shell, thereby sealing the shell around the user's nose and mouth. Various implementations involve multiple couplers at an attachment region between the material shell and securing portion, which facilitate the application of forces with two or more degrees of freedom for securing to the user's face. Further, various implementations facilitate replacing filters utilized with the mask shell.

Abstract: Aspects of various embodiments herein may be implemented as follows. An apparatus has a material shell, which may be conformed to a user's face, and a securing portion connected to the shell that operates to secure a filter, such as to the user's face with the filter covering the user's nose and mouth. A securing force can be applied to the filter via the first material portion, thereby sealing the filter around the user's nose and mouth. Various implementations involve multiple couplers at an attachment region between the material shell and securing portion, which facilitate the application of forces with two or more degrees of freedom for securing the filter to the user's face. Further, various implementations facilitate replacing filters utilized with the mask shell.

Abstract: Aspects of various embodiments herein may be implemented as follows. An apparatus has a material shell, which may be conformed to a user's face, and a securing portion connected to the shell that may operate to secure a filter, such as to the user's face with the filter covering the user's nose and mouth. A securing force can be applied to the material shell, thereby sealing the shell around the user's nose and mouth. Various implementations involve multiple couplers at an attachment region between the material shell and securing portion, which facilitate the application of forces with two or more degrees of freedom for securing to the user's face. Further, various implementations facilitate replacing filters utilized with the mask shell.

Abstract: Aspects of various embodiments herein may be implemented as follows. An apparatus has a material shell that conforms to a user's face, and a securing portion connected to the shell that operates to secure a filter to the user's face with the filter covering the user's nose and mouth. A securing force is applied to the filter via the first material portion in a direction toward the user's face, thereby sealing the filter around the user's nose and mouth. Various implementations involve elastic and other material that facilitate sealing of the filter around the user's nose and mouth.

Abstract: A mask-type apparatus facilitates air filtration. In accordance with one or more embodiments, a mask includes a shell and a filter coupled to the shell. The shell secures the filter to a user's face, with the filter being between the shell and the user. In some implementations, the filter and shell are secured to one another via a valve that passes air between a user and an environment. With these approaches, the mask-type apparatus readily facilitates replacement of the filter while also providing a secure fitment of the filter to a user's face, for a variety of applications.