The Songmics OBN51BK is an ergonomic office chair with a mesh backrest and an adjustable headrest, built for long stretches of desk work. The backrest uses a breathable polyester mesh that lets heat and moisture escape instead of trapping them, while the contoured seat is foam-filled and covered with the same mesh fabric.
Adjustment and ergonomics
Seat height adjusts between 46 and 55.5 cm, so the chair suits a low desk as readily as a standard 75 cm worktop. The headrest slides up and down and pivots, letting you rest your neck when you lean back and take the load off the cervical spine. The 73-81 cm backrest supports the whole length of the back, and the tilt mechanism with tension adjustment lets you match the recline resistance to your weight or lock it out altogether. The armrests are softly padded and fold upwards, so the chair can be pushed under the worktop to save space in a small room.
Specifications
- overall dimensions: 67 cm wide, 70 cm deep, 114-131 cm high;
- seat: 51 x 52 cm, height adjustable from 46 to 55.5 cm;
- backrest 73-81 cm high, armrests 22.5 cm above the seat;
- nylon five-star base, 70 cm diameter, castors 50 mm in diameter;
- materials: polyester mesh, foam, polypropylene, nylon;
- chair weight 16.2 kg, maximum load 120 kg;
- black finish.
Assembly and use
The chair arrives flat-packed for self-assembly; the manufacturer quotes around 15 minutes and no second pair of hands. An Allen key, a bag of fittings and the instructions are included. The five-armed nylon base spans 70 cm, which keeps the chair steady even when you lean back, and the 50 mm castors swivel through a full 360 degrees. Standard nylon castors work best on carpet; on hard floors a protective mat is worth adding.
Who it suits
The OBN51BK is aimed at home offices and workstations where ventilation and adjustability matter more than heavy upholstery. A mesh back earns its keep in summer and in warmer rooms, where a fully padded chair quickly becomes uncomfortable. The maximum load is 120 kg and the 51 cm wide seat leaves room to shift position through the day.
