HBADA Ergonomic Office Chair - Black / High-Elastic Foam Seat for Pressure Relief / Mesh & Foam Seat with Plywood Base / Slight Backrest Tilt up to 115° / 8cm Gas Lift Class 3 Height Adjustment / 360° Rotation / Smooth Nylon Base with Silent Casters / Modern Minimalist Design / J101BMC / J101BMC

The HBADA J101, listed as J101BMC, is a black ergonomic office chair combining a breathable mesh back with a high-elastic foam seat on a plywood base. It rotates a full 360 degrees on a nylon five-star base with silent casters and supports a maximum weight of 150kg. Minimalist styling keeps it usable in a home study as well as an office.

The backrest uses a bionic S-shaped curve rather than a flat panel. That shape mirrors the natural profile of the spine, so the mesh makes contact along the length of the back instead of only at the shoulders, and the chair holds you in the same posture whether you are upright or leaning into the recline.

The lumbar support adjusts in two dimensions, moving 4.5cm vertically and rotating through 45 degrees. Height puts the support in the hollow of your lower back, while rotation angles the pad so it meets the curve rather than pressing on one edge of it. Both are set by hand while seated.

The seat is a 10cm high-density cushion made from high-elastic sponge. High-elastic foam springs back after each sitting rather than staying compressed, which is what keeps a cushion the same height and firmness in its second year as it was on the first day, particularly under the sitting bones where the load concentrates.

The J101 mixes breathable mesh with foam over a plywood seat base. Plywood gives the seat a rigid platform to sit on so the foam does not sag through the middle, while the mesh sections let air move rather than trapping it, balancing airflow against the firm support a solid base provides.

The high configuration model reclines to 115 degrees, while the standard model reaches 105 degrees. Just past upright is where most desk work happens; opening it toward 115 degrees shifts weight from the seat onto the backrest, which is the change that makes a difference over a long stretch at a screen.

On the high configuration model the seat depth adjusts through 4cm, giving a cushion depth of 44 to 49cm. Sliding it out supports more of the thigh for taller users; pulling it in keeps the front edge clear behind the knee. The standard model has a fixed 42cm seat with no depth adjustment.

The seat measures 49cm across on both configurations. The high configuration uses an ergonomic contoured curve that shapes the cushion around you, while the standard model uses a flat pad. A contoured seat holds you centred rather than letting you drift sideways as concentration takes over during a long task.

Both configurations use a back frame made from PP combined with fibre. Fibre reinforcement is what lets a moulded frame hold the S-curve of the backrest under load without needing a heavy steel structure behind the mesh, which keeps the chair light enough to move between rooms on its own casters.

The armrests flip up. Folded, they let the chair push fully under a desk when you stand, and they clear the space beside your hips if you sit sideways or need to get in and out in a tight corner. It is also the simplest armrest mechanism, with less to loosen over time.

The gas lift gives 8cm of height adjustment on both configurations, and the seat rotates a full 360 degrees. Eight centimetres covers the gap between a low writing desk and a standard office one, and full rotation means turning to a second screen or a printer without dragging the chair sideways.

The chair stands on a nylon five-star base fitted with silent rolling wheels. Nylon keeps the base light while spreading the load across five arms, and quiet casters matter in a shared office or a home where the desk is in the same room as everything else and every movement would otherwise be audible.

HBADA recommends the high configuration model for users between 155cm and 185cm tall, and the standard model for 140cm to 175cm. Maximum weight capacity is 150kg. Checking your height against those ranges is what determines whether the backrest curve and seat depth actually land where they are designed to.