A seat (1000) may include mounting components (1054a, 1054b) that may mate with corresponding components on other assemblies. The seat may include one or more features that may rotate or move to provide for coupling to the one or more assemblies. Assemblies include, but are not limited to, a stroller, a bicycle adapter, a wagon, a booster seat, a camping chair, a high chair, a stadium seat/picnic table, a hiking pack, an infant carrier, a car seat, a booster car seat, or an airline seat.

A stadium seat cushion including a seat cushion main body and a backrest is disclosed. The seat cushion main body has filling material inside. The backrest is pivotally connected to the seat cushion main body. The backrest includes a support state and a folded state. When the backrest is in the folded state, rotate the backrest away from the seat cushion main body, it enters the support state. When the backrest is in the support state, rotate the backrest to a position flush with the seat cushion main body, thereby entering the folded state.

A stadium seat cushion including a seat cushion main body and a backrest is disclosed. The seat cushion main body has filling material inside. The backrest is pivotally connected to the seat cushion main body. The backrest includes a support state and a folded state. When the backrest is in the folded state, rotate the backrest away from the seat cushion main body, it enters the support state. When the backrest is in the support state, rotate the backrest to a position flush with the seat cushion main body, thereby entering the folded state.

A collapsible stadium seat with a seat member that defines a base plane, and seat membrane support members. A seat membrane is coupled to and spans the space between the seat membrane support members to define a user seating surface. The seat membrane is angled backward such that its front portion is farther from the base plane than is its back portion. There is also a cantilevered back that is pivotably coupled to the seat member and includes first and second spaced back support members. A back membrane is coupled to the support members. The support members are angled or curved to define a lumbar support region. There are back adjustment mechanisms that can be locked and unlocked and allow the back to pivot, to establish a comfortable use position.

A collapsible stadium seat with a seat member that defines a base plane, and seat membrane support members. A seat membrane is coupled to and spans the space between the seat membrane support members to define a user seating surface. The seat membrane is angled backward such that its front portion is farther from the base plane than is its back portion. There is also a cantilevered back that is pivotably coupled to the seat member and includes first and second spaced back support members. A back membrane is coupled to the support members. The support members are angled or curved to define a lumbar support region. There are back adjustment mechanisms that can be locked and unlocked and allow the back to pivot, to establish a comfortable use position.

An inflatable cushion that is orally inflatable using exhaled air. The inflatable cushion also can be inflated by breathing into an inflation chamber portion of the cushion and then squeezing the inflation chamber (e.g., with a user's hands and fingers), thereby increasing the pressure, to push additional air into the passages and channels to fill the seat cushion. A separate deflation chamber of the seat cushion can have a tubular check valve designed to be squeezed that opens the valve to deflate. The deflation chamber can be used to adjust the comfort of the inflatable cushion or to empty the inflatable cushion after use. The inflatable cushion can be made of thin plastic or similar material that is lightweight and can be folded, creating a structure that can be used several times before disposal.

An inflatable cushion that is orally inflatable using exhaled air. The inflatable cushion also can be inflated by breathing into an inflation chamber portion of the cushion and then squeezing the inflation chamber (e.g., with a user's hands and fingers), thereby increasing the pressure, to push additional air into the passages and channels to fill the seat cushion. A separate deflation chamber of the seat cushion can have a tubular check valve designed to be squeezed that opens the valve to deflate. The deflation chamber can be used to adjust the comfort of the inflatable cushion or to empty the inflatable cushion after use. The inflatable cushion can be made of thin plastic or similar material that is lightweight and can be folded, creating a structure that can be used several times before disposal.

An inflatable cushion that is orally inflatable using exhaled air. The inflatable cushion also can be inflated by breathing into an inflation chamber portion of the cushion and then squeezing the inflation chamber (e.g., with a user's hands and fingers), thereby increasing the pressure, to push additional air into the passages and channels to fill the seat cushion. A separate deflation chamber of the seat cushion can have a tubular check valve designed to be squeezed that opens the valve to deflate. The deflation chamber can be used to adjust the comfort of the inflatable cushion or to empty the inflatable cushion after use. The inflatable cushion can be made of thin plastic or similar material that is lightweight and can be folded, creating a structure that can be used several times before disposal.

An inflatable cushion that is orally inflatable using exhaled air. The inflatable cushion also can be inflated by breathing into an inflation chamber portion of the cushion and then squeezing the inflation chamber (e.g., with a user's hands and fingers), thereby increasing the pressure, to push additional air into the passages and channels to fill the seat cushion. A separate deflation chamber of the seat cushion can have a tubular check valve designed to be squeezed that opens the valve to deflate. The deflation chamber can be used to adjust the comfort of the inflatable cushion or to empty the inflatable cushion after use. The inflatable cushion can be made of thin plastic or similar material that is lightweight and can be folded, creating a structure that can be used several times before disposal.