Sihoo Doro-C300 is engineered to provide continual, next-level support and comfort to you, coming with self-adaptive lumbar support, flexible backrest, 3D coordinated armrests, and more, all for a comfortable seating experience even after long periods of time, allowing you to work with higher productivity and unleash your creativity. Ergonomic lumbar support for constant waist comfort Streamlined seatback that flexes and matches your back Wide multi-adjustable headrest for high-precision neck and head support 3D coordinated armrests to relax your arms in all postures Smart weight-sensing chassis for an effortless and balanced reclining experience Waterfall-shaped seat for weightless seating