RESPAWN FLEXX vs SIHOO M18
Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.
$109.01
lower starting price for SIHOO M18 than RESPAWN FLEXX at the brand stores
Differences at a glance
Sources
- RESPAWN product page — specifications ↗Checked Oct 17, 2026
- M18 Classic Ergonomischer Bürostuhl – SIHOO DE official store ↗Checked Oct 16, 2026
- Sihoo M18 Ergonomic Office Chair – Official US Sihoo Store ↗Checked Sep 29, 2026
RESPAWN FLEXXSIHOO M18
- Price
- $399$289.99 – $299.99
- Seat height
- 19.3–22.2 in44–54 cm
- Seat depth
- 18.9–20.5 in17.91 in (≈ 45.5 cm)
- Load capacity
- 300 lb330 lb (≈ 150 kg)
- Headrest
- height-adjustable, pivoting, paddedHeadrest moves 3.9" up and down and pivots 45°
- Lumbar support
- padded, adjustableLumbar support adjusts vertically and horizontally
Questions
Which is cheaper, the RESPAWN FLEXX or the SIHOO M18?
The SIHOO M18 is cheaper to start: $289.99 versus $399 for the RESPAWN FLEXX at the brand stores (Oct 2026).
Which has a higher weight capacity?
The SIHOO M18, rated for 330 lb versus 300 lb for the RESPAWN FLEXX.
Which has a headrest?
Both: the RESPAWN FLEXX as standard and the SIHOO M18 as standard.
Swap in a similar chair
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- SIHOO M18 vs FlexiSpot OC3 Arms: Adjustable armrests on SIHOO M18; 2D on FlexiSpot OC3.