# SIHOO M18 Ergonomic Office Chair with Dual-Adjustable Lumbar Support

Source: https://figforyou.com/us/chairs/sihoo-m18

- **Brand:** SIHOO
- **Model:** M18
- **Category:** Chairs
- **Spec source:** SIHOO product pages, checked 2026-10-17

## Purchase

Verified merchant links are available on the web page: [https://figforyou.com/us/chairs/sihoo-m18](https://figforyou.com/us/chairs/sihoo-m18)

## Specifications

| Spec | Value | Source |
|---|---|---|
| Max load | 330 lbs | https://www.sihoo.com/products/m18-ergonomic-chair |
| Recline | Maximum 126° recline angle | https://www.sihoo.com/products/m18-ergonomic-chair |
| Lumbar support | Lumbar support adjusts vertically and horizontally | https://www.sihoo.com/products/m18-ergonomic-chair |
| Armrest adjustment | Adjustable armrests (up and down) | https://www.sihoo.com/products/m18-ergonomic-chair |
| Headrest adjustment | Moves 3.9" up and down and pivots 45° | https://www.sihoo.com/products/m18-ergonomic-chair |
| Seat depth | 17.91" | https://www.sihoo.com/products/m18-ergonomic-chair |
| Seat width | 20.08" max hip width | https://www.sihoo.com/products/m18-ergonomic-chair |
| Dimensions | 28"W x 27"D x 44"-51"H | https://www.sihoo.com/products/m18-ergonomic-chair |
| Weight | 37.1 lbs | https://www.sihoo.com/products/m18-ergonomic-chair |
| Materials | Polyester mesh fabric; steel, aluminum & nylon framing parts; polypropylene back/headrest framing; cushion chair padding | https://www.sihoo.com/products/m18-ergonomic-chair |
| Warranty | 3 years | https://www.sihoo.com/products/m18-ergonomic-chair |

## How it compares in Chairs

- **Max load:** 330 lbs (source: https://www.sihoo.com/products/m18-ergonomic-chair) - Higher weight rating than 5 of 17 other checked models; level with 3

## Related buyer guides

- [Best Ergonomic Office Chair: Spec Comparison](https://figforyou.com/us/guide/best-ergonomic-chair.md): Office chair comparison on seat height range, lumbar support, armrest adjustment and recline as stated on each manufacturer's pages.