The Sihoo Doro C300 Pro V2 ergonomic chair automatically tracks your whole body

Ergonomic chairs with support in the right places can make your day a lot more comfortable. The catch, unfortunately, is that no one sits in the exact same position the whole time. We lean forward to type, then recline to think for a second, then lean forward again, push back to stretch, and so much more. Meanwhile, you’re continuously trying to find the perfect position again.

Most ergonomic chairs offer manual adjustments for multiple focus areas, with each needing its own changes. However, Sihoo treats every shift as one continuous motion and manages everything automatically. The Sihoo Doro C300 Pro V2 is one of the first full-body adaptive ergonomic chairs, built around a system that tracks your head, back, lumbar area, and arms as a group. Sihoo has been in the ergonomic chair business for 15 years, and the Doro C300 Pro V2 is its latest. Here’s what you need to know.

DynaCore and SyncroFlex: tracking your body as a whole

The Sihoo Doro C300 Pro V2’s DynaCore system keeps it all running. It uses real-time gravity sensing to track how your body is moving and coordinates the head, lumbar, back, and arm supports so they respond together. When you shift position, all four zones adjust at roughly the same time, so you don’t end up with support in one area and a gap in another. The system is also linked to the armrests, and everything runs without any manual input.

While DynaCore handles the chair coordination as a whole, the SyncroFlex system focuses on the backrest itself. It uses a dual-spring, dual-track structure that reads your spine curvature and lets the backrest glide along with it as you move. The chair conforms to your body as soon as you sit down – no manual setting adjustments required – and the lumbar support slides with your center of gravity to maintain contact through the recline.

The biggest advantage of the SyncroFlex is when multiple people use the same chair. The ideal setup for one person rarely works for another. But because the Sihoo Doro C300 Pro V2 reads spine curvature on the fly rather than relying on presets, the same chair works for everyone.

Self-Adaptive Dynamic Lumbar Support 2.0 and 8D bionic armrests

The lumbar system features three selectable support modes – Firm Lumbar Support, Gentle Lumbar Support, and Sacrum Support – aimed at different body types and personal preferences. You’ll also find extra width and a dedicated pressure-relief spring to support larger users. And the lumbar pad slides down with you as you recline, keeping contact with your sacrum through the motion.

The armrests get a similarly detailed set of adjustments. They move 85mm up and down, 40mm forward and back, and tilt 20 degrees downward for typing, which keeps your elbows supported and your shoulders from creeping up during long typing sessions. The rear section flips up 36 degrees with a 40-degree upward tilt, useful for resting your elbows during handheld gaming or reading on a tablet.

They also shift 125mm side to side with inward and outward rotation, so they can line up with a desk that isn’t perfectly centered or match your arm angle rather than forcing your arm to match the armrest. When you recline, the armrests move with the chair and tilt up to 40 degrees further, keeping your arms supported through the motion.

Headrest, seat, and recline positions

The Sihoo Doro C300 Pro V2 has an ultra-Wide 3D headrest that follows your neck as it moves, whether you’re leaning forward to read a screen or turning your head slightly. This addresses a common headrest problem you’ll find with other chairs: the pad supports you correctly in only one fixed position and leaves your neck unsupported the moment you shift.

Underneath the chair, a Smart Weight-Adaptive Mechanism automatically adjusts recline resistance to your body weight, so the recline always feels smooth and controlled, without needing to manually tune the tension knob most chairs rely on.

The seat itself uses a pressure-minimized cushion designed to spread weight evenly across your thighs and hips, paired with roughly 1.97 inches of seat depth adjustment. The mesh across the seat and backrest, called Cloud Mesh 2.0, is built to stay breathable during long sitting sessions.

You’ll find three recline zones with the Sihoo Doro C300 Pro V2. 105 degrees is for upright, focused work; 120 degrees is for relaxed or creative tasks, while the full 135-degree recline, paired with the chair’s footrest, is for deep relaxation during breaks.

Fit and build

The Doro C300 Pro V2 adjusts across a fairly wide range. The seat height runs from 44.5 to 53cm (about 17.5 to 20.9 inches), and the chair’s overall height adjusts from about 109 to 130cm (43 to 51 inches) depending on the headrest position.

The seat depth adjusts from 43 to 47cm (about 16.9 to 18.5 inches), while the backrest itself measures about 54.5cm (21.5 inches) wide. The base is 70cm (27.6 inches) across and sits on PU silent casters.

Get the Sihoo Doro C300 Pro V2 now

If you constantly shift between typing, reading, and leaning back to think, the Sihoo C300 Pro V2 is the ergonomic chair that can keep up with all of it, without you needing to touch a single lever. The DynaCore and SyncroFlex systems handle the tracking, while the lumbar support and armrests do the rest. And the three recline zones cover everything from a focused session to a proper break.

The chair is backed by BIFMA, SGS, TÜV, and IGR certifications, covering both safety and build-quality testing. And if it’s not the right fit, Sihoo offers a 30-day trial period along with a 1-year warranty.

The Sihoo Doro C300 Pro V2 starts at $429.99 and comes in black or white. And for a limited time, Android Authority readers can enjoy an additional 6% discount with code SIHOOAA from the official Sihoo store.