Sihoo Doro C300 Pro V2 tracks posture with $550 chair

The Sihoo Doro C300 Pro V2 ergonomic chair automatically tracks your whole body, adjusting lumbar support, backrest and armrests in real time without any manual input.

The chair’s DynaCore system uses gravity sensors to detect how you move, then coordinates four support zones—head, lumbar, back and arms—so they shift together as you lean, recline or stretch. Sihoo, a 15-year-old ergonomic brand, says this is the first full-body adaptive chair to treat posture changes as a single motion rather than a series of separate tweaks. Most rivals still rely on preset adjustments for each zone, leaving gaps when you change position.

The backrest uses SyncroFlex, a dual-spring, dual-track mechanism that follows your spine as it curves and straightens. Lumbar support has three modes—Firm, Gentle or Sacrum—and automatically slides down as you recline to keep constant contact. Armrests move 85 mm up and down, 40 mm forward and back, and tilt 20 degrees downward for typing, then flip up 36 degrees for gaming or tablet use. They also shift 125 mm side to side and rotate to match different body widths.

Analysts say the chair’s price tag—around $550—will limit mass adoption, but reviewers highlight its ability to switch users without losing settings. Ergonomists add that continuous monitoring beats fixed presets for long-term comfort. Sihoo plans firmware updates to add posture alerts and app integration later this year.