An asymmetric umbrella comprising: a canopy; a shaft eccentrically disposed beneath said canopy; a runner slidably mounted on said shaft and slidable between a first position, wherein said canopy is collapsed, and a second position, wherein said canopy is extended; and a plurality of rib assemblies forming a canopy supporting frame, each of said rib assemblies being coupled to the apex of said shaft at a proximal end and coupled to said canopy at a distal end, wherein said plurality of rib assemblies further comprises: a short main rib assembly having a deployment arm and a rib, wherein said deployment arm is coupled to said runner and to said rib, and said rib is coupled to said shaft apex and to said deployment arm; and a long main rib assembly having a deployment arm, a proximal rib, a connecting arm, and a distal rib, wherein said deployment arm is coupled to said runner and to said proximal rib; said proximal rib is coupled at one end to said shaft apex; and wherein the distal end of each of said plurality of rib assemblies points in the same direction when said canopy is collapsed, the asymmetric umbrella being characterised in that: the long main rib assembly further comprises a support rib, said proximal rib is coupled to another end to said connecting arm and to said support rib, and said connecting arm and said support rib are in parallel relation and are coupled to said proximal rib and to said distal rib. a canopy; a shaft eccentrically disposed beneath said canopy; a runner slidably mounted on said shaft and slidable between a first position, wherein said canopy is collapsed, and a second position, wherein said canopy is extended; and a plurality of rib assemblies forming a canopy supporting frame, each of said rib assemblies being coupled to the apex of said shaft at a proximal end and coupled to said canopy at a distal end, wherein said plurality of rib assemblies further comprises: a short main rib assembly having a deployment arm and a rib, wherein said deployment arm is coupled to said runner and to said rib, and said rib is coupled to said shaft apex and to said deployment arm; and a long main rib assembly having a deployment arm, a proximal rib, a connecting arm, and a distal rib, wherein said deployment arm is coupled to said runner and to said proximal rib; said proximal rib is coupled at one end to said shaft apex; and wherein the distal end of each of said plurality of rib assemblies points in the same direction when said canopy is collapsed, a short main rib assembly having a deployment arm and a rib, wherein said deployment arm is coupled to said runner and to said rib, and said rib is coupled to said shaft apex and to said deployment arm; and a long main rib assembly having a deployment arm, a proximal rib, a connecting arm, and a distal rib, wherein said deployment arm is coupled to said runner and to said proximal rib; said proximal rib is coupled at one end to said shaft apex; and wherein the distal end of each of said plurality of rib assemblies points in the same direction when said canopy is collapsed, the asymmetric umbrella being characterised in that: the long main rib assembly further comprises a support rib, said proximal rib is coupled to another end to said connecting arm and to said support rib, and said connecting arm and said support rib are in parallel relation and are coupled to said proximal rib and to said distal rib. the long main rib assembly further comprises a support rib, said proximal rib is coupled to another end to said connecting arm and to said support rib, and said connecting arm and said support rib are in parallel relation and are coupled to said proximal rib and to said distal rib.