Fast Shipping Within 7 Days | 3 Years Warranty

M56C Ergonomic Office Chair with Ultra-Wide Dual-Section Backrest

Sale price $199.99 Regular price $219.99

Benefits

  • Ultra-wide dynamic lumbar support for continuous comfort
  • Enveloping backrest for full-back support
  • Wide headrest for ample neck support
  • W-shaped seat cushion for pressure-free seating

Promises

  • 30-Day Worry-Free Trial: Try the chair for 30 days. If it’s not for you, feel free to return it.
  • 3-Year Warranty: Enjoy lasting comfort and peace of mind with our 3-year warranty.
  • Fast Shipping: Receive your chair in just 5-7 days, in US and CA.
  • Satisfaction Guarantee: For any issues, contact support@sihoooffice.com for prompt assistance and guaranteed satisfaction.

Payment methods

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How to choose a right ergonomic office chair?

Check out our buying guide for you!

Sitting all day shouldn't leave you feeling sore and worn out. If your lower back aches after hours at your desk or your seat feels flat and unforgiving by mid-afternoon, it’s time for a better solution. The Sihoo M56C is designed to relieve daily pressure with dynamic lumbar support and a soft, contoured seat—so you can sit comfortably, stay focused, and get through your workday without the strain.

Sihoo M56C Ergonomic Office Chair

Headrest

Lumbar Support

Armrests

Comfort Seating

M56C Spacious Headrest
Sihoo M56C Headrest

Spacious Headrest

Neck strain is a common issue when your chair doesn't support your posture. The M56C’s wide, adjustable headrest gives your neck the support it needs, helping prevent stiffness and pain from looking at screens all day.

Sihoo M56C Lumbar Support
Sihoo M56C Chair Lumbar Support

Ultra-Wide Dynamic Lumbar Support

Tired of lower back pain after a long day at your desk? The M56C’s ultra-wide dynamic lumbar support moves with your body to keep your spine properly aligned. Whether you're leaning forward or reclining, it offers real-time support that helps reduce pressure and discomfort.

Sihoo M56C Adjustable Armrests
Sihoo M56C Chair Adjustable Armrests

Adjustable Armrests

Tired of armrests that don’t match your setup? The M56C’s adjustable armrests move up and down. They support your arms in any sitting position, reducing shoulder tension and wrist fatigue—ideal for typing, writing, or gaming.

Sihoo M56C Full-Back Support Meets Pressure-Free Seating
Sihoo M56C Chair Full-Back Support Meets Pressure-Free Seating

Full-Back Support Meets Pressure-Free Seating

Tired of backaches and sore hips from sitting too long? The M56C features an ultra-wide, dual-section backrest that hugs your entire back—from lower spine to shoulders—for balanced support all day. Paired with a soft, W-shaped seat cushion that follows the natural curves of your hips and thighs, it helps reduce pressure points and keeps you comfortable, even during long work sessions.

Adjustable Comfort

Sihoo M56C Chair Adjustable Comfort

Adaptive Lumbar System

  • Support That Moves With You

    Whether you’re leaning forward or reclining back, the dynamic lumbar support adjusts in real time to keep your lower back fully supported.

  • Comfort for Every Body

    No matter your size or weight, the lumbar support flexes and rebounds to match your body’s shape—giving you tailored support that never quits.

  • Engineered for Real Support

    A side view of the dual-layer lumbar system reveals its built-in flexibility and firm core—designed to cradle your spine where it matters most.

Sihoo M56C office chair

@sihoo_studio

For every part of you

Specifications

  • Overview

    Experience all-day comfort with the Sihoo M56C ergonomic chair. Designed to support every body type, it features ultra-wide dynamic lumbar support that moves with you, a full-back enveloping backrest, and a wide headrest for neck relief. The soft, W-shaped seat cushion fits your hips and thighs for pressure-free sitting—perfect for long hours at your desk.

    Name: Sihoo M56C Ergonomic Chair

    General Dimensions: 28"W x 27"D x 44"-52"H

    Product Weight: 37.15bs

    Assembly: Requires assembly

    Materials:

    • Premium breathable mesh
    • Reinforced steel and nylon structure
    • Polypropylene back and headrest framing
    • Cotton seat cushion

    Maximum Load: 300 lbs

    Warranty: (3) years warranty

  • M56C office chair specifications

    Seat depth: 17.1"

    Max hip width: 20"

    Maximum load: 300 lbs

    Reclining lock with 1 position, allowing a maximum tilt angle of 125°.

    Armrests: adjustable up and down

  • M56C Ergonomic Office Chair BIFMA

    Certified by BIFMA and SGS for long-lasting performance.

Compare & Pick the Right Chair

What's the difference between M56B, M56C and C300?

M56C chair

M56C

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M56B

Doro C300 office chair

C300

Recline angle

110° - 125°

110° - 125°

110° - 120° - 130°

Armrests

Up and down adjustable

3D adjustable

4D adjustable

Mesh Material

High elastic mesh back + cotton cushion

Full chair with Dragon-Scale mesh

Mid-grade polyester mesh

Price

$209.99

$229.99

$289.99