Seating comprising a back portion extending substantially upwardly from a seat portion, the back portion comprising at least one indentation, each indentation being positioned along an upper edge of the back portion to permit an elongated portion of an object to be seated within the indentation to hang over the back portion of the seating.

Seating comprising a back portion extending substantially upwardly from a seat portion, the back portion comprising at least one indentation, each indentation being positioned along an upper edge of the back portion to permit an elongated portion of an object to be seated within the indentation to hang over the back portion of the seating.

A body support structure includes a structural lattice structure having a first stiffness, and a compressive lattice structure supported by the structural lattice structure and having a second stiffness less than the first stiffness. A skin lattice structure is supported by the compressive lattice structure, wherein the skin lattice structure is resistant to shear deformation in response to a normal force and is expandable in a direction transverse to the normal force.

A body support structure includes a structural lattice structure having a first stiffness, and a compressive lattice structure supported by the structural lattice structure and having a second stiffness less than the first stiffness. A skin lattice structure is supported by the compressive lattice structure, wherein the skin lattice structure is resistant to shear deformation in response to a normal force and is expandable in a direction transverse to the normal force.

A chair with a chair back having a frame and a backrest. The backrest is connected to a bottom frame portion of the frame and two side frame portions at two opposite ends of the bottom frame portion by injection molding for a user to lean against. A hardness of the backrest is lower than a hardness of the frame, and the frame is provided with two supporting portions for correspondingly supporting two sides of the user's waist. Thereby, the components with different hardness are capable of forming the integrally formed chair back, and enabling the chair back to be both supportive and comfortable for leaning against.

A chair with a chair back having a frame and a backrest. The backrest is connected to a bottom frame portion of the frame and two side frame portions at two opposite ends of the bottom frame portion by injection molding for a user to lean against. A hardness of the backrest is lower than a hardness of the frame, and the frame is provided with two supporting portions for correspondingly supporting two sides of the user's waist. Thereby, the components with different hardness are capable of forming the integrally formed chair back, and enabling the chair back to be both supportive and comfortable for leaning against.

A molded seat comprising a molded seat pan having a seat portion and a molded seat insert configured to engage the seat portion of the molded seat pan. The molded seat insert may have a lower surface defining at least one lower recess and an upper surface defining at least one upper recess. The at least one upper recess and the at least one lower recess may be at least partially aligned with each other. The molded seat pan may also have a backrest portion, and a molded backrest insert may be mounted thereto.

A molded seat comprising a molded seat pan having a seat portion and a molded seat insert configured to engage the seat portion of the molded seat pan. The molded seat insert may have a lower surface defining at least one lower recess and an upper surface defining at least one upper recess. The at least one upper recess and the at least one lower recess may be at least partially aligned with each other. The molded seat pan may also have a backrest portion, and a molded backrest insert may be mounted thereto.

A supporting mold frame of a folding chair for a vacuum-formed seat board includes a supporting frame and one or more supporting abutting members. The vacuum-formed seat board includes a seat panel and a side extending downward from all sides of the seat panel, and the supporting frame abuts an inner side of the side. The one or more supporting abutting members support a bottom surface of the seat panel adjacent to a peripheral edge of the seat panel, the one or more supporting abutting members support a left side and a right side of the bottom surface of the seat panel, or the one or more supporting abutting members support the left side and the right side of the bottom surface of the seat panel adjacent to corners of the seat panel.

A supporting mold frame of a folding chair for a vacuum-formed seat board includes a supporting frame and one or more supporting abutting members. The vacuum-formed seat board includes a seat panel and a side extending downward from all sides of the seat panel, and the supporting frame abuts an inner side of the side. The one or more supporting abutting members support a bottom surface of the seat panel adjacent to a peripheral edge of the seat panel, the one or more supporting abutting members support a left side and a right side of the bottom surface of the seat panel, or the one or more supporting abutting members support the left side and the right side of the bottom surface of the seat panel adjacent to corners of the seat panel.