Sihoo Doro S300 features an Anti-Gravity Mechanism and premium materials for unparalleled comfort. Enjoy support that feels weightless and advanced ergonomics that adjust to your every move.

Weightless recline that feels almost effortless

The anti-gravity recline system creates an ultra-light, pressure-relieving lean-back feel, helping your body feel more supported and less compressed as you recline.

Cloud-like mesh that stays cool

The premium breathable mesh promotes airflow while delivering a softer, more refined sitting feel, helping you stay cooler and more comfortable through long hours.

Dual lumbar support that fits you more precisely

Two adjustable lumbar zones help the S300 adapt more closely to your lower back, creating a more personalized and balanced support feel throughout the day.

6D armrests that support every position

The 6D armrests adjust in multiple directions and move with your recline, helping keep your arms supported whether you’re working upright, leaning back, or shifting tasks.

Upper-back support that adjusts to your frame

The independently adjustable upper backrest helps the chair fit different heights more naturally, improving shoulder and upper-back support through long sitting sessions.

Spacious head support for work and recline

The large integrated headrest gives your neck and head more room to rest comfortably, whether you’re focused at your desk or leaning back to reset.

Effortless controls for a personalized fit

Convenient controls make it easy to fine-tune seat height, recline, and lumbar support, so you can adjust the chair more precisely to your body and routine.

Premium design built for long-term performance

High-end materials, advanced engineering, and trusted safety certifications help the S300 deliver a more refined sitting experience with dependable long-term durability.

View assembly instructions 1/1 (PDF)

Linked seat-and-back support structure

The S300 uses a four-bar linked support mechanism that connects the seat and backrest into a synchronized structure. This integrated frame helps maintain stable support geometry through different recline angles and improves overall structural consistency.

Aerospace-grade anti-gravity spring mechanism

The recline system uses aerospace-grade spring plates and a precision tension adjustment structure to deliver controlled elasticity, smoother recline response, and long-term mechanical durability.

Dual dynamic lumbar mechanism with angle adjustment

The bionic lumbar system features dual support zones with a dynamic adaptive structure and infinitely adjustable lumbar angle. This multi-point lumbar mechanism is designed to provide more precise lower-back contact across different body types and sitting positions.

Integrated upper-back frame with segmented adjustment

The upper-back and headrest are built into an integrated support frame with segmented height adjustment, helping distribute support more evenly across the neck, shoulders, and upper back while improving fit for different users.

6D PU armrests with multi-directional adjustment

The multi-function armrests feature soft PU pads and support six-way adjustment, including height, forward/back, inward/outward, rotation, and upward flip, providing flexible support across work, recline, and mobile-use positions.

Suspended pressure-relief seat with depth adjustment

The seat uses a suspended cushioning structure with a curved pressure-relief surface and adjustable seat depth, helping improve weight distribution, structural flexibility, and long-term seating support.

Certified gas lift, steel base, and silent PU casters

The SGS- and BIFMA-tested gas lift, reinforced 350-grade steel base, and large silent PU casters provide stable height adjustment, durable load-bearing performance, smooth rolling, and reliable floor protection.

30-Day Free Returns.: 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.

Satisfaction Guarantee: For any issues, contact support_ca@sihoo.com for prompt assistance and guaranteed satisfaction.