Sidiz T80 vs Herman Miller Cosm High Back
Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.
VS
Herman Miller
Herman Miller Cosm High Back
$1,925 – $2,400
16.1 lb
lighter: Herman Miller Cosm High Back weighs less than Sidiz T80 (official specs)
Differences at a glance
Sources
- T80 work-tech chair – SIDIZ (SIDIZ official store, Korea) ↗Checked Sep 29, 2026
- High-Back Cosm Chair - Herman Miller Store ↗Checked Sep 29, 2026
- Cosm Specs - Herman Miller ↗Checked Sep 29, 2026
- US Herman Miller Store (price) ↗Checked Oct 11, 2026
Sidiz T80Herman Miller Cosm High Back
- Price
- ₩689,000 – ₩859,000$1,925 – $2,400
- Load capacity
- Maximum load 125 kg (≈ 276 lb)350 lb (158.8 kg)
- Arms
- 3D adjustable armrests (height, front-back position, left-right angle)Leaf Arms; Height-Adjustable Arms; Fixed Arms; No Arms; Arm Height: 7.3–11.7"
- Warranty
- 15-year quality warranty (for customers who register the product)12-year, 3-shift warranty, with limited exceptions
What users mention
From 3 Sidiz T80 and 33 Herman Miller Cosm High Back user reviews, most mentioned first. Green is liked, orange is a caution.
Comfort
Sidiz T804 mentionsHerman Miller Cosm High Back31 mentionsAdjustability
Sidiz T803 mentionsHerman Miller Cosm High Back31 mentionsDesign
Sidiz T802 mentionsHerman Miller Cosm High Back23 mentionsRecline and tilt
Sidiz T800 mentionsHerman Miller Cosm High Back19 mentionsArmrests
Sidiz T802 mentionsHerman Miller Cosm High Back12 mentionsBuild quality
Sidiz T801 mentionHerman Miller Cosm High Back12 mentions
Questions
What do owners mention most?
Comfort for the Sidiz T80, and comfort for the Herman Miller Cosm High Back, based on review summaries.
Sidiz T80: specs, reviews, where to buy →Herman Miller Cosm High Back: specs, reviews, where to buy →
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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.
- Herman Miller Cosm High Back vs Steelcase Gesture Arms: Leaf Arms on Herman Miller Cosm High Back; Width 10.25–22.5 in between arms on Steelcase Gesture.
- Herman Miller Cosm High Back vs Okamura Contessa II Arms: Leaf Arms on Herman Miller Cosm High Back; 4D arm or fixed arm on Okamura Contessa II.
- Herman Miller Cosm High Back vs Steelcase Leap V2 Load capacity: 350 lb on Herman Miller Cosm High Back; 400 lb on Steelcase Leap V2.
- Herman Miller Cosm High Back vs Humanscale Freedom Arms: Leaf Arms on Herman Miller Cosm High Back; 6 in range of vertical motion on Humanscale Freedom.