Emma + Oliver - 24/7 300 lb. Rated High Back Swivel Seat Slider Lumbar Ergonomic Office Chair - Black Mesh & Fabric

The Onyx chair is all about contoured comfort. Lumbar support keeps back strain and tech neck at bay for all-day focus, while a clean, minimalist silhouette complements any workspace.

This ergonomic mesh office chair is designed for all-day comfort and space-saving convenience. It features a human-curve-contoured backrest with adjustable lumbar support for healthy posture and reduced back pressure. The high-density foam seat is breathable and non-sagging, while the 90° flip-up armrests allow the chair to tuck neatly under a desk when not in use. The backrest reclines from 90° to 135°, and the chair rolls smoothly on a sturdy metal base with quiet casters.

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.