Sihoo Doro C300 Pro V2 ergonomic chair automatically tracks and adjusts to your body
The Sihoo Doro C300 Pro V2 is an adaptive ergonomic chair with full-body tracking, automatically coordinating head, back, lumbar, and arm support as users shift positions.
On Sep 2, 2026, Sihoo announced the Doro C300 Pro V2, described as one of the first full-body adaptive ergonomic chairs. Instead of relying on manual adjustments for each support zone, the chair uses a system that monitors the head, back, lumbar area, and arms as one connected unit and adjusts them together whenever the user changes posture.
The chair's DynaCore system uses real-time gravity sensing to track body movement and coordinates all four support zones simultaneously. When a user shifts position, the headrest, lumbar pad, backrest, and armrests respond at roughly the same time, avoiding gaps in support. The system operates without manual input. A separate SyncroFlex system handles the backrest with a dual-spring, dual-track structure that reads spine curvature and lets the backrest glide along with it. According to Sihoo, this allows the same chair to adapt to different users without presets, which is especially useful when multiple people share one chair.
The lumbar support offers three selectable modes: Firm Lumbar Support, Gentle Lumbar Support, and Sacrum Support. Extra width and a dedicated pressure-relief spring accommodate larger users. The lumbar pad slides down as the user reclines, maintaining contact with the sacrum. The 8D bionic armrests adjust 85mm vertically, 40mm forward and back, tilt 20 degrees downward for typing, and have a rear section that flips up 36 degrees with a 40-degree upward tilt for resting elbows during handheld gaming or tablet reading. They also shift 125mm side to side with inward and outward rotation to align with desks that are not perfectly centered, and they move with the chair during recline, tilting up to 40 degrees further.
The ultra-wide 3D headrest follows the neck as it moves, addressing the common problem of headrests that only support one fixed position. A Smart Weight-Adaptive Mechanism automatically adjusts recline resistance based on the user's body weight, eliminating the need to manually tune a tension knob. The seat uses a pressure-minimized cushion and offers about 1.97 inches of depth adjustment. The Cloud Mesh 2.0 material on the seat and backrest is designed for breathability during long sitting sessions. The chair provides three recline zones: 105 degrees for focused work, 120 degrees for relaxed or creative tasks, and 135 degrees for deep relaxation with the footrest.
The Doro C300 Pro V2 fits a range of body sizes. Seat height runs from 44.5 to 53cm (about 17.5 to 20.9 inches), and overall chair height adjusts from roughly 109 to 130cm (43 to 51 inches) depending on headrest position. Seat depth adjusts from 43 to 47cm (about 16.9 to 18.5 inches), the backrest is about 54.5cm (21.5 inches) wide, and the base measures 70cm (27.6 inches) across. Sihoo, which has been making ergonomic chairs for 15 years, is positioning the Doro C300 Pro V2 as an automatic alternative to traditional manually adjustable chairs.
Sihoo launched the Doro C300 Pro V2, an ergonomic chair that uses gravity sensing and spine-curvature tracking to automatically coordinate head, back, lumbar, and arm support. It targets users who want hands-free adjustment across multiple postures, offering features like adaptive recline resistance, 8D armrests, and a three-mode lumbar system.