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Description
Sihoo M90 High-End Ergonomic Office Chair with Adaptive Lumbar Support for Different Postures






After 3 years of research and design, M90C converges with craftsmanship to adopt a split backrest, which can more quickly disperse the pressure on the lumbar spine, to make more people can enjoy the comfortable experience brought by the ergonomic chair.
- Smart dynamic lumbar pillow with separate dynamic support for the lumbar spine and back, helping to release pressure on the lumbar back separately
- 3D armrests with back linkage to keep arms comfortable even when leaning back
- 6CM backrest lift for accurate support of the lumbar spine
- Double-joint elastic headrest, double joint adjustment for more accurate cervical support, stretch mesh for comfort and elastic
- 130° recline, relax and enjoy yourself during the break
- High quality, rigorously tested: passed BIFMA and SGS test, use safe and durable precision steel mechanism
- Fully Textilene fabric, breathable, elastic and waterproof
- A part of the home aesthetic: whether for home use or office seating, it is suitable for a variety of situations

MATERIALS
• Nylon + fiber adaptive lumbar support
• S-shaped back frame, PP + fiber material, fit the curve of the spine
• Mechanical steel multifunctional mechanism
• 3D PU armrest surface
• 350 aluminium alloy chair feet, passed 1136kg static pressure test
• φ60 carpet casters or hard floor casters with quiet roll technology

Shipping & Delivery Information
At Furniture Castle, we’re committed to ensuring a smooth and timely delivery experience for every customer. Please review the information below regarding product availability and shipping timelines.
In-Stock Items :Products marked as in stock will typically be dispatched within 3-5 business days of order confirmation. You will receive tracking details once your order is shipped.
Out-of-Stock or Backordered Items: If an item is temporarily unavailable or on backorder, our team will contact you promptly to confirm availability and share an estimated delivery timeline. Please note that delivery times may vary depending on the product and supply conditions.
Shipping Information
- Shipping costs shown at checkout are estimates and may vary based on your delivery location and product dimensions.
- If there is a difference between the
estimated and actual shipping cost, the final shipping charge will be billed separately. - For larger or oversized items, we recommend contacting us directly with your delivery address to receive an accurate shipping quote before placing the order.
We're here to assist you at every step—from order placement to final delivery—ensuring a reliable and transparent shopping experience.
Furniture Safety Warning
At Furniture Castle, your family’s safety is our top priority. Unsecured furniture can tip over and cause serious injuries, especially to young children. To help prevent accidents:
- anchor furniture securely to a wall or floor.
- heavier items in lower drawers or on bottom shelves.
- on furniture not specifically designed to hold them.
- only one drawer at a time to prevent tipping.
- climb, sit, or hang on drawers, doors, or shelves.
For more safety information, visit www.productsafety.gov.au.
