An adjustable chair may include a frame, a seat pan, a backrest, a pair of arm rests, at least two legs each comprising an inner leg configured to telescope out of an outer leg, and a leg locking system for locking the outer leg to the inner leg.

The embodiments herein provide a collapsible and foldable chair. The collapsible chair includes a harness member for fastening to an object. The collapsible chair comprises a seating assembly, a pair of front legs, midcross bars, a left arm support, and a right arm support. The seating assembly comprises a seat and a backrest. The seating assembly is collapsible and foldable for storage. The pair of front legs are extended from the seat assembly. A pair of front legs are hinged to a footer base. The mid-cross bars are designed to connect the seating assembly with the pair of front legs.

A portable chair includes a frame and a sling for accommodating a seated user. The frame includes an upper back pair of bars, a lower back pair of bars, a hub configured to couple the upper back pair of bars to the lower back pair of bars, a middle pair of bars configured to be coupled to a corresponding one of the lower back pair of bars, a front pair of bars configured to be coupled to a corresponding one of the middle pair of bars, and a front joint configured to couple the front pair of bars to each other.

A portable chair includes a frame and a sling for accommodating a seated user. The frame includes an upper back pair of bars, a lower back pair of bars, a hub configured to couple the upper back pair of bars to the lower back pair of bars, a middle pair of bars configured to be coupled to a corresponding one of the lower back pair of bars, a front pair of bars configured to be coupled to a corresponding one of the middle pair of bars, and a front joint configured to couple the front pair of bars to each other.

An adjustable chair may include a frame, a seat pan, a backrest, a pair of arm rests, at least two legs each comprising an inner leg configured to telescope out of an outer leg, and a leg locking system for locking the outer leg to the inner leg.

An adjustable chair may include a frame, a seat pan, a backrest, a pair of arm rests, at least two legs each comprising an inner leg configured to telescope out of an outer leg, and a leg locking system for locking the outer leg to the inner leg.

A foldable chair includes a flat back inclined surface, a bottom flat horizontal surface, a cushion component, and a support component including the flat back inclined surface, the bottom flat horizontal surface, and two triangular side supports. Further, the bottom flat horizontal surface is connected to the flat back inclined surface by the two triangular side supports, and each triangular side support includes an upper rotatable connection, and the upper rotatable connections face one another for connecting the flat back inclined surface with the support component. Furthermore, the cushion component includes a bottom cushion resting on the bottom flat horizontal surface, the bottom cushion has a flat portion and an angled portion. Moreover, the bottom flat horizontal surface includes at least two hand grips on opposite edges of a distal end of the bottom flat horizontal surface.

A foldable chair includes a flat back inclined surface, a bottom flat horizontal surface, a cushion component, and a support component including the flat back inclined surface, the bottom flat horizontal surface, and two triangular side supports. Further, the bottom flat horizontal surface is connected to the flat back inclined surface by the two triangular side supports, and each triangular side support includes an upper rotatable connection, and the upper rotatable connections face one another for connecting the flat back inclined surface with the support component. Furthermore, the cushion component includes a bottom cushion resting on the bottom flat horizontal surface, the bottom cushion has a flat portion and an angled portion. Moreover, the bottom flat horizontal surface includes at least two hand grips on opposite edges of a distal end of the bottom flat horizontal surface.

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.