SIHOO - B300 Pro Ergonomic Mesh Chair, 6D Armrest, 3D Headrest Office Chair for Adult, Seat Depth, Home & Gaming, 330lbs - Black

The SIHOO A3 office chair, an innovative ergonomic model, uses advanced technology to ensure comfortable sitting and proper posture. It features automatically adjustable 3D headrest, lumbar support, linked 3D armrests, an intelligent gravity mechanism, and automatic adjustment, along with a soft backrest and breathable mesh seat for all-day comfort. Its 3D headrest offers wide-angle adjustment (4.5cm up/down, 6.5cm forward/backward, 20° angle) and is made of soft mesh with a triangular soft elastic frame and support straps for back support; the 4-position adjustable 6cm liftable backrest suits all heights and auto-reverts to level 1 when at maximum height. It also comes with domino auto-adaptive lumbar support. The intelligent gravity mechanism with weight-adjustable resilience enables 2-step auto-adjustment and tilting from 92° to 100° to 112° (max), allowing comfortable rocking or short breaks. Certified by American BIFMA and German TUV, it has passed tests like backrest strength and seat impact tests, and is equipped with SGS Class 4 cylinders for durability and safety. It comes with a 3-year warranty, with support available for any product issues.

Life doesn’t stick to one room, and neither should your chair. Whether you are grinding through emails in your home office, catching up on a show in the living room, or unwinding after a long day in your entertainment room, the SIHOO B100 ergonomic office chair is built to keep up without skipping a beat. Let us start with what matters most: your back. The adaptive dynamic lumbar support uses a dual-back design that actually responds to you. Lean in to focus, sit up straight for a meeting, or shift around mid-afternoon. This desk chair follows your movement so your lower back never feels locked in place. It is support that moves with you, not against you.Need a break? Pull out the smooth footrest, lean back, and suddenly your office chair becomes your personal escape. Whether you are taking a quick power nap between calls, settling in for a movie night, or stretching out during a long gaming session, the SIHOO B100 turns any space into a spot to truly relax. The 4D flip-up armrests give you total control over your posture. Adjust them up, down, forward, backward, or rotate them to fit your frame. When you are done, flip them up and tuck the chair neatly under your desk. Three recline angles let you switch from focused work to full-on lounge mode in seconds.The 3D ultra-wide headrest adjusts to support your neck naturally so your shoulders stay relaxed during long calls or typing marathons. The plush widened seat cushion spreads your weight evenly so there is no more shifting around after a few hours. And because nobody likes a sweaty back, the full mesh chair construction keeps air flowing whether you are deep in a spreadsheet or deep into a gaming marathon. Built with a reinforced metal base and a Class 4 SGS-certified gas lift, this big and tall office chair supports up to 300 lbs with quiet stable performance. The smooth casters glide silently across any floor so you will not disturb anyone working or relaxing nearby. Backed by 36 months of coverage, 30-day easy returns, and a support team that responds within 24 hours, the SIHOO B100 is more than an executive chair. It is the one place you can count on to keep you comfortable, focused, and ready for whatever comes next.

SIHOO C300 Pro V2 – A New Era of Adaptive Comfort. Real comfort moves with you — and the C300 Pro V2 is engineered to do exactly that. Whether you're leaning forward to type or sitting back to think, its DynaCore Full-Body Support system responds to every shift, keeping your spine aligned and your body at ease. The SynchroFlex Backrest molds to your unique spinal curve, spreading pressure evenly across your back so you stay comfortable from your first coffee to your last email. With Smart Gravity Response that automatically adjusts recline resistance to your weight, plus an intuitive right-side control for height, tilt, and seat depth, this chair adapts effortlessly to your body. The Self-Adaptive Lumbar Support 2.0 acts like a second pair of hands, actively hugging your lower back to eliminate gaps and prevent strain. Paired with a 3D Superwide Headrest and 8D Bionic Armrests, it delivers full upper-body support that keeps you focused, relaxed, and ready for anything — whether you're working, gaming, or simply unwinding.