{"product_id":"sihoo-b300-pro-ergonomic-office-chair-without-footrest-4d-lumbar-support-20261008-234350-b0hk","title":"SIHOO B300 Pro Ergonomic Office Chair Without Footrest, 4D Lumbar Support","description":"\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003eGrey\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePattern:\u003c\/strong\u003eSolid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003ePack of 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e28.34 x 28.93 x 51.18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Weight:\u003c\/strong\u003e40.8 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Weight Recommendation:\u003c\/strong\u003e300 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003eArm Pad, Caster, Chair, Cushion, Headrest\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e1 Count\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel Name:\u003c\/strong\u003eoffice chair\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel Number:\u003c\/strong\u003eB300PRO-US-M2202\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm Factor:\u003c\/strong\u003eErgonomic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003eMesh, Ergonomic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTheme:\u003c\/strong\u003eOffice, Studio, Video Game\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional Features:\u003c\/strong\u003eAdjustable Backrest, Adjustable Headrest, Adjustable Height, Adjustable Lumbar, Ergonomic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Uses For Product:\u003c\/strong\u003eDrafting, Gaming, Office, Reading, Relaxing, Sleeping, Study, Video Game\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoom Type:\u003c\/strong\u003eBedroom, Drawing Room, Game Recreation Room, Office, Study Room\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAge Range Description:\u003c\/strong\u003eAdult, Teen\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface Recommendation:\u003c\/strong\u003eHard Floor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndoor Outdoor Usage:\u003c\/strong\u003eIndoor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Highlight:\u003c\/strong\u003eAdjustable Backrest ＆Seat Depth, 6D Flip-Up Armrests, 3D Wide Headrest，Breathable Mesh, 135° Recline, High Back, Grey\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003eB300PRO-US-MS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Type:\u003c\/strong\u003eMesh\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame Material Type:\u003c\/strong\u003ePlastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Care Instructions:\u003c\/strong\u003eWipe Clean\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat Material:\u003c\/strong\u003eMesh\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFill Material:\u003c\/strong\u003eMesh\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpholstery Fabric Type:\u003c\/strong\u003eNylon, Polyester\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFurniture Base Movement:\u003c\/strong\u003eSwivel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReclining Position Count:\u003c\/strong\u003e110-135 Degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Height Positions:\u003c\/strong\u003e5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack Style:\u003c\/strong\u003eErgonomic, Split Back\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle Name:\u003c\/strong\u003eModern\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish Types:\u003c\/strong\u003ePolished\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArm Style:\u003c\/strong\u003e6D Flip-up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFurniture Finish:\u003c\/strong\u003eMesh\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCushion Style:\u003c\/strong\u003eCurved Edge, Mesh\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeg Style:\u003c\/strong\u003eStar Base\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions D x W x H:\u003c\/strong\u003e28.34\"D x 28.93\"W x 51.18\"H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat Back Interior Height:\u003c\/strong\u003e22.83 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat Height:\u003c\/strong\u003e21.77 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat Depth:\u003c\/strong\u003e18.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat Length:\u003c\/strong\u003e19.09 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArm Height:\u003c\/strong\u003e28.93 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChair Backrest Width:\u003c\/strong\u003e19.48 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Seat Depth Maximum:\u003c\/strong\u003e18.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Seat Depth Minimum:\u003c\/strong\u003e16.53 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Seat Height Minimum:\u003c\/strong\u003e18.42 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Seat Height Maximum:\u003c\/strong\u003e21.77 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssembly Instructions Description:\u003c\/strong\u003eAttach The Wheelbase To The Gas Lift Cylinder, Mount The Seat Mechanism, Connect The Backrest, And Install The Armrests And Headrest\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout this item\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eADJUSTABLE LUMBAR SUPPORT THAT MOVES WITH YOU Long hours at your desk can leave your lower back tense and unsupported. The B300 PRO ergonomic office chair uses a spring-assisted 4D lumbar support that adjusts in height and glides forward independently. It also flexes your body to maintain steady contact as you move. Lean forward for focused work, sit upright through meetings, or recline to recharge. The lumbar support follows every shift, helping ease pressure and keep you comfortably centered from morning to night.\u003c\/li\u003e\n\u003cli\u003eRAISE THE BACKREST. FIND YOUR FIT. Most chairs force your body to adapt to a fixed backrest. The B300 PRO does the opposite. Its independently height-adjustable backrest lets you position the lumbar support where your lower back needs it. The result is a more natural sitting position and fuller back contact for users of different heights. Whether you work from a home office or share a workspace, this ergonomic chair delivers a personalized fit that feels stable, balanced, and effortless throughout the day.\u003c\/li\u003e\n\u003cli\u003eSIT DEEPER. FEEL LIGHTER. A seat that is too shallow or too deep can leave your legs unsupported and make long hours feel even longer. Adjust the seat depth to match your leg length and create fuller thigh support. A better fit spreads body weight more evenly and helps ease pressure during extended sitting. Power through deadlines, study for hours, settle into a gaming session, or unwind with a book. The breathable mesh seat keeps air moving, so this desk chair helps you stay cool and comfortable without constant repositioning.\u003c\/li\u003e\n\u003cli\u003eRECLINE WITHOUT THINKING You should not have to adjust knobs every time you lean back. This computer chair uses a smart weight-sensing mechanism to match recline resistance to your body weight—no manual tension adjustment needed. Stay upright for focused tasks, lean back to think between meetings, or recline up to 135° for a quick reset. The chair follows your movement smoothly and stays balanced through every transition, so each position feels natural and supported.\u003c\/li\u003e\n\u003cli\u003eFULL-BODY SUPPORT, DESIGNED AROUND YOU Neck and shoulder tension can build when a chair supports only your back. The oversized 3D headrest adjusts to cradle your neck during long video calls, reading, or quiet moments of relaxation. The 6D armrests rotate, slide, lift, and flip up to meet your arms where they naturally rest. Type, create, game, or sit cross-legged with support that adapts around you. This flexible setup makes it easy to use as a focused office chair by day and a supportive gaming chair after hours.\u003c\/li\u003e\n\u003cli\u003eBUILT TO LAST. BACKED BY SIHOO. Built with premium materials and rigorously tested to meet BIFMA, SGS, and TÜV standards, the B300 PRO office chair is designed for dependable daily use. Every chair comes with a 3-year warranty and 30-day hassle-free returns, giving you confidence from day one. Choose with confidence and enjoy lasting ergonomic comfort every day.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIHOO","offers":[{"title":"Default Title","offer_id":67662749827160,"sku":"B0HK3SM3X7","price":485.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/5898\/5816\/files\/71FJR9rDPJL._AC_SL1500.jpg?v=1791470650","url":"https:\/\/zenofficeshop.com\/products\/sihoo-b300-pro-ergonomic-office-chair-without-footrest-4d-lumbar-support-20261008-234350-b0hk","provider":"ZenOffice","version":"1.0","type":"link"}