Sidiz T80 vs Duorest Alpha
Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.
VS
Differences at a glance
Sources
- T80 work-tech chair – SIDIZ (SIDIZ official store, Korea) ↗Checked Sep 29, 2026
- DUOREST ALPHA (official product page) ↗Checked Sep 29, 2026
- Duorest Alpha Brochure (PDF) ↗Checked Sep 29, 2026
- DUOREST Warranty (official) ↗Checked Sep 29, 2026
- Duoback Official Store (Korea) (price) ↗Checked Sep 29, 2026
Sidiz T80Duorest Alpha
- Price
- ₩689,000 – ₩859,000₩413,000 – ₩520,000
- Load capacity
- Maximum load 125 kg (≈ 276 lb)Standard 300 lbs. weight capacity
- Recline
- Multi-limited tilt (limits backrest recline angle), tilt tension adjustmentBack reclines 18° from upright position; 3:1 back to seat synchronous movement with 3 position backlock
- Arms
- 3D adjustable armrests (height, front-back position, left-right angle)3D arms: height adjustment range 72mm (2.8”), front-to-back adjustment range 40mm (1.6”), pivoting arm caps 17º inward and 17º outward
- Headrest
- Headrest height / angle adjustmentOptional Headrest accessory adjusts 49mm (1.9”) vertically; pivoting range 63º
- Warranty
- 15-year quality warranty (for customers who register the product)3 Year Body Frame; 1 Year Mechanism, Cylinder, Form, Casters; 1 Year Flexible Rubber Connector, Seat Pan Materials
What users mention
From 3 Sidiz T80 and 0 Duorest Alpha user reviews, most mentioned first. Green is liked, orange is a caution.
Comfort
Sidiz T804 mentionsDuorest Alpha2 mentionsAdjustability
Sidiz T803 mentionsDuorest Alpha3 mentionsBack support
Sidiz T802 mentionsDuorest Alpha3 mentionsDesign
Sidiz T802 mentionsDuorest Alpha3 mentionsArmrests
Sidiz T802 mentionsDuorest Alpha1 mentionBuild quality
Sidiz T801 mentionDuorest Alpha2 mentions
Questions
Which has a headrest?
Both: the Sidiz T80 as standard and the Duorest Alpha as an option.
What do owners mention most?
Comfort for the Sidiz T80, and back support for the Duorest Alpha, based on review summaries.
Swap in a similar chair
More comparisons
- Sidiz T80 vs Herman Miller Aeron Headrest: Headrest height / angle adjustment on Sidiz T80; None offered by Herman Miller on Herman Miller Aeron.
- Sidiz T80 vs Steelcase Gesture Headrest: Headrest height / angle adjustment on Sidiz T80; Optional on Steelcase Gesture.
- Duorest Alpha vs SIHOO Doro S300 Load capacity: Standard 300 lbs. weight capacity on Duorest Alpha; 330 lb on SIHOO Doro S300.





