Excellent AlzaErgo Chair Abyss 2 discounted by thousands! It has a synchronous mechanism and 4D armrests

An ergonomic chair for less than eight thousand, on which you can sit all day without back pain. The AlzaErgo Chair Abyss 2 is available on Alza for 7,794 CZK with code ALZADNY35. Synchronous mechanism, adjustable lumbar support, mesh back for ventilation, HR foam in the seat, and 4D armrests. One reviewer compared it to a Herman Miller, another user sits on it 12 hours a day without issues. For that price, it’s one of the best ergonomic chairs on the Czech market.

Quick summary:
✅ Makes sense if you spend 8+ hours a day at the computer and want a chair that forces you to sit correctly — without costing as much as a Herman Miller.
⚠️ Consider that the lumbar support is prominent and cannot be adjusted in depth — if you have a flat back, it might not suit you. And the armrests do not have horizontal locking, so they sometimes shift.
💡 For 7,794 CZK you get a synchronous mechanism, 4D armrests, adjustable seat (height + depth), mesh back, HR foam, a headrest adjustable in two axes, a metal base, and a weight capacity of 130 kg.

Why people praise it

Synchronní mechanismus je klíčový — sedák a opěrák se pohybují závisle, takže židle podporuje aktivní sezení s rozsahem naklápění 90–135°. Odpor houpání se plynule reguluje a opěrák lze aretovat v několika úhlech. HR pěna v sedáku je pevnější než běžná PUR pěna, drží tvar a je prodyšná. Síťovaná záda zajišťují cirkulaci vzduchu — v létě oceníte, že se nepotíte. Sedák se nastavuje výškově (47,5–57 cm) i posuvem dopředu/dozadu pro přizpůsobení délce stehen.

According to reviewers, assembly takes 10–15 minutes — most parts fit together, only two screws are needed. The robust metal base with integrated footrests and hard wheels (60 mm) works excellently on both carpet and hard floors. The recommended user height is 160–190 cm, but reviewers from 156 cm to 185 cm confirm that the chair fits them well.

What to expect

The most common complaint in reviews: the lumbar support is significantly convex and cannot be adjusted in depth. Some users find this comfortable and it has alleviated back pain, while for others, it causes discomfort — especially if they have a flat back. The armrests are 4D (height, sides, depth, angle), but the horizontal movement does not have a lock — they sometimes shift when leaning on them. The headrest is adjustable, but the position might be unsuitable when sitting upright — it works better when slightly reclined. And the manual in the package is, according to users, terrible — but assembly is so simple that you don’t need it.

How much are you willing to invest in an office chair — and did it pay off for you?