A collapsible chair may include a frame comprising a pair of Y-brace frames, a pair of X-brace frames arranged generally orthogonally relative to the Y-brace frames, and a foldable seat side member. A collapsible article of furniture may include a pair of Y-brace frames where each of the Y-brace frames includes a pair of Y-shaped assemblies and each assembly includes a crossing member and a support brace member pivotally intersecting the crossing member along its length and the crossing members of each of the Y-shaped assemblies may pivotally engage one another and extend to opposing support brace members and the crossing members may be slidably coupled to the opposing support brace members. A collapsible chair may include a pair of arching wire supports and a back rest, comprising a membrane stretched between the pair of arching wire supports and providing lumbar support.