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SIHOO B300 Pro Ergonomic Office Chair with Footrest, 4D Lumbar Support - color: Light Grey

SIHOO B300 Pro Ergonomic Office Chair with Footrest, 4D Lumbar Support - color: Light Grey

$497.47 USD
$497.47 USD
Sale Sold out
Taxes included. Shipping calculated at checkout.

About this item

  • ADJUSTABLE 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 4-way lumbar system 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.
  • RAISE 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. This creates a more natural sitting position and fuller back contact for users of different heights. Whether you’re working through a deadline or leaning back to unwind, this ergonomic chair delivers a personalized fit that feels stable, balanced, and effortless.
  • SIT DEEPER. STRETCH FARTHER. A seat that does not match your leg length can create unwanted thigh pressure and make long hours feel even longer. Adjust the seat depth to create a better fit and fuller thigh support. When it is time to unwind, pull out the retractable footrest and elevate your legs to help ease pressure. Work through a deadline, read, game, or take a well-earned break. The breathable mesh seat keeps air moving, so this desk chair helps you stay cool and comfortable from start to finish.
  • RECLINE, STRETCH OUT, RESET Switching from focused work to a well-earned break should feel effortless. This computer chair uses a smart weight-sensing recline mechanism to match resistance to your body weight—no manual tension adjustment needed. Lean back smoothly, extend the footrest, and stretch out whenever you need a reset. Whether you’re taking a quick break, watching a movie, or relaxing between tasks, the chair stays balanced and supportive as your body settles in.
  • FULL-BODY SUPPORT FROM HEAD TO TOE True comfort should support more than your back. The oversized 3D headrest adjusts to cradle your neck during long video calls, reading, or relaxed reclining. The 6D armrests rotate, slide, lift, and flip up to support typing, creative work, or sitting cross-legged. Pull out the retractable footrest whenever your legs need a break. Whether you use it as an everyday office chair or an after-hours gaming chair, the B300 PRO keeps you comfortably supported from head to toe.
  • BUILT TO LAST. BACKED BY SIHOO. Built with premium materials and rigorously tested to meet BIFMA, SGS, and TÜV standards, the B300 PRO 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. If you need help, our dedicated customer support team responds within 24 hours with fast, reliable assistance. Choose with confidence and enjoy lasting ergonomic comfort every day.

Overview

  • Brand: SIHOO
  • Color: Light Grey
  • Material: Mesh
  • Product Dimensions: 28.34"D x 28.93"W x 51.18"H
  • Size: Pack of 1

Low stock: 10 left

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Reviews

  • ⭐⭐⭐⭐⭐

    Emily Carter — Seattle, Washington

    I found several useful workspace products at OfficeMellow, and the overall selection felt practical and easy to browse. The items fit well into my home office and helped make the space feel more organized, comfortable, and ready for everyday work.

  • ⭐⭐⭐⭐⭐

    Daniel Brooks — Austin, Texas

    OfficeMellow offers a thoughtful mix of furniture, electronics, and office accessories. The product information was easy to understand, and I was able to find options that matched the size and layout of my workspace without making the setup feel complicated.

  • ⭐⭐⭐⭐⭐

    Jason Reed — Denver, Colorado

    I like that the products are focused on real workspace needs rather than unnecessary extras. I chose a few items for desk organization and device positioning, and they helped create a cleaner setup that feels easier to use throughout the day.

  • ⭐⭐⭐⭐⭐

    Olivia Bennett — Portland, Oregon

    The selection worked well for upgrading my small home office. The products felt practical, fit naturally into my existing setup, and made it easier to keep my equipment, cables, and work area organized. I would consider shopping here again.

FAQ

What types of products does OfficeMellow sell?

OfficeMellow specializes in home office and small business workspace products, including office desks, chairs, storage furniture, monitor and laptop stands, office electronics, cable management, task lighting, shredders, laminators, scanners, docking stations, and related accessories.

How can I check whether a product will fit my workspace?

Please review the dimensions, weight capacity, mounting requirements, and available clearance listed on the product page. For desks, chairs, cabinets, and mounted accessories, we recommend measuring your room, doorway, desk surface, and installation area before ordering.

How do I know whether an electronic accessory is compatible with my device?

Check the product page for supported device models, port types, operating systems, voltage, plug type, monitor size, weight limits, or printer compatibility. Contact us before purchasing if you are uncertain about compatibility.

Do office furniture products require assembly?

Many desks, chairs, cabinets, stands, and shelving products require some assembly. Assembly requirements and included hardware vary by product, so please review the individual product description and instructions before purchase and use.

How much does shipping cost?

OfficeMellow charges a flat standard shipping fee of $6.90 per eligible order, unless a different charge or delivery restriction is clearly shown during checkout.

How long does order processing and delivery take?

Orders are generally processed within 1–3 business days. Estimated delivery within the United States is typically 5–10 business days after shipment. Oversized furniture, split shipments, carrier delays, or high-demand periods may require additional time.

Why did only part of my order arrive?

Products may be stored in different warehouses or shipped in multiple boxes. As a result, items and furniture components may arrive separately with different tracking numbers. Please review all shipping confirmation emails before reporting an incomplete delivery.

Can I change or cancel my order?

Please contact us as soon as possible after placing your order. We will make a reasonable effort to update or cancel an order that has not entered processing or shipment, but changes and cancellations cannot be guaranteed once fulfillment has begun.

What is your return policy?

Eligible products may generally be returned within 30 calendar days of delivery, subject to our Return & Refund Policy. Items should be unused, unassembled, uninstalled, and returned with their original packaging, hardware, manuals, and accessories. Contact us for authorization before sending a return.

What should I do if my product arrives damaged, defective, or incomplete?

Contact us within 7 calendar days of delivery whenever reasonably possible. Include your order number, a description of the issue, and clear photographs of the product, packaging, shipping label, and affected components. Please retain all packaging until the claim has been reviewed.

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