Abstract: A chair includes a base, a seat board, a frame unit, a backrest and two armrests. The base has a cylinder, legs, and casters. The seat board is connected to the top of the base and a support frame is connected to the base so as to be connected with the frame unit. The backrest and the two armrests are detachably connected to the frame unit. The backrest and the two armrests are made by durable Nylon so as to have proper curvatures that meet ergonomic requirements. The material of the backrest and the armrests can be detached and/or replaced.

Abstract: A chair is presented that includes a pair of chair arms, two pairs of chair legs, and a sheet of fabric. Each chair arm has a concave shape and a concave groove extending along the entire length of a concave surface of the chair arm. Each pair of chair legs is affixed to a bottom surface of each chair arm opposite the groove. The sheet of fabric has a pair of flexible rods. Each rod is affixed to the fabric and is substantially parallel to one another. The sheet of fabric is affixed to the chair by threading each of the rods through a different one of the corresponding grooves.