Another entry in the $100 plastic chair search is the Cinto by Human Scale. This chair has a perforated seat and back that introduces flex and ventilation in the manner of some of the newer advanced task seating - a first I think for inexpensive pull up chairs. The size and frequency of the perforations introduces different amounts of flex to the seat and back in strategic locations increasing the comfort of the chair. Its available with arms, or without, with legs or cantilever base, or with wheels even. Several nice colors, and silver or black frames.