Onex STC X Hardcore gaming chair, up to 125 kg, 2D armrests, White

The backrest angle changes from 90 to 135 degrees. Upright, you sit square to the monitor and keyboard, which suits fast-paced games and writing. Leaned back, you can watch a video, wait for the next match or take a short break without getting up. The manufacturer does not say how many locking positions there are within that range.

A butterfly mechanism is a seat tilt mechanism in which the seat and backrest move together, so the chair can rock back slightly. Your posture changes even when you leave the backrest angle alone. The chair is built on a metal frame, which together with the 125 kg load rating gives it a solid, planted feel in everyday use.

Onex lists the armrests as two-dimensional (2D), meaning they adjust in two directions. A well-set armrest keeps your forearms at desk or keyboard height, so your shoulders do not creep up while you use the mouse. That matters most when you sit at the computer for several hours in a row and switch between gaming and work.

White suits a bright room and a setup with white peripherals, where a black chair would look heavy. At 22 kg the chair is solidly built: it stands firmly on the floor, although you will feel the weight when moving it to another room. A white surface shows dirt more readily than a dark one, so it is worth cleaning now and then.

Players who want a reclining backrest both for focused matches and for breaks; people working from home at the same desk; and anyone with a bright gaming corner who likes a white interior. The chair is rated for users up to 125 kg, and the metal frame gives it a sturdy base for daily use.