SIHOO M57

The M57 is the entry point for anyone who needs better back support but is working to a tight budget, and it packs unusually genuine ergonomic adjustment into that price. SIHOO's UK store lists it at an RRP of around £240 and frequently discounts it to about £200. For that money it offers a cushioned, height- and depth-adjustable lumbar support, breathable mesh, 3D armrests and tilt lock, which is more genuine ergonomic adjustment than most chairs at this price. Creative Bloq's review rates it well overall while being clear about the limits: the lumbar does not track your movement the way pricier self-adaptive or spring-panel systems do, and build quality is the main compromise versus the FlexiSpot above and the premium chairs. It is the right call if your budget is firmly under ~£300 and you want the essential adjustments; if you can stretch to the C7, you get sturdier construction and a self-adaptive lumbar for not a lot more.