Our Take
The SIHOO M57 is a mid-range ergonomic office chair that sits comfortably in the sweet spot between budget mesh chairs and premium executive models. It's genuinely designed for people who spend 6-8 hours a day sitting—whether you're working from home, running a business, or dealing with back pain that makes cheap chairs unbearable. SIHOO has built a reputation for sensible ergonomics at reasonable prices, and the M57 is one of their most popular models for UK home offices.
The chair features a breathable mesh backrest (crucial if you get hot easily), lumbar support you can adjust to match your lower back's natural curve, and a tilt mechanism that actually locks at different angles rather than just flopping back. The seat cushion uses medium-density foam that doesn't go pancake-flat after a few months. The base is a standard five-point design with smooth-rolling castors, and it'll support users up to around 120kg comfortably. The armrests adjust in height and width, which sounds small until you realise how many chairs skip this and leave your shoulders aching.
Compared to budget alternatives like basic mesh chairs from supermarkets, the M57 gives you proper lumbar adjustment and decent materials—you're not fighting the chair all day. Against premium brands like Herman Miller or Steelcase, you're trading some advanced features (like 3D lumbar adjustment) and longevity, but keeping your money. UK buyers should check your ceiling height if you're taller than 6'2", and make sure you've got floor space—it's a full-size chair, not compact. Everything arrives in one package and takes about 30 minutes to assemble with basic tools.
Key Features
Fully adjustable lumbar support with three-position depth control
Breathable mesh backrest with high-density backing, seat depth adjustable from 42-48cm
Tilt lock mechanism with eight-position angle settings (85°–115° recline range)
Padded armrests with height and width adjustment
Five-point base with smooth-rolling castors, supports users up to 120kg
Maximum seat height range 44–54cm (standard gas cylinder), 720mm seat width
Our Verdict
Buy the M57 if you're working from home long hours and your back's given you grief with budget chairs—it's the practical upgrade that actually fixes the problem without costing the earth. Skip it if you need industrial durability for 10+ years or you spend more time moving around than sitting still.