Sihoo

A direct-to-consumer ergonomic furniture brand with 15 years of development

Sihoo is an ergonomic furniture brand that sells directly to consumers through its Official US Sihoo Store, and the site also runs a Dealer Locator for buyers who prefer a reseller. The site offers free shipping to the United States and Canada and ships to over 100 countries worldwide according to its own pages. The site's promise bar lists "30-Day Worry-Free Returns" beside the shipping offer. All chairs come backed by a 3-year warranty, stated consistently across multiple product pages. The site displays prices in US dollars and provides a country or region selector allowing customers to switch locations. The about page says the company has had "a 15-year focus on technology and well-being", and the homepage frames the same figure as "Pioneering in ergonomic tech for 15 Years". The company reports that its products are featured in over 2000 media outlets annually and claims to sell over 1.9 million products per year worldwide across delivery to 122 countries. Its stated mission is to "Elevate the quality of people's life via furniture innovation", and the about page says production is managed in Foshan, China, with orders shipped from local U.S. and Canada warehouses where applicable. The company's core values are listed as quality, innovation, pursuit and win-win partnership, suggesting a commitment to both customer satisfaction and supplier relationships. In its own words, Sihoo is "a prominent specialist in ergonomic furniture, dedicated to offering healthy and comfortable ergonomic products".

Three pricing tiers and product lines

Sihoo organizes its office chairs into three distinct price and feature tiers, allowing shoppers to find options at different budgets. The entry-level tier includes the M18 (priced from 169.99 USD on sale to 289.99 USD regular price) and the B100 series (B100 base model from 199.99 USD, B100 PRO from 259.99 USD). These models are positioned as start-strong options for customers seeking basic ergonomic support at accessible price points. The mid-range tier features the M57 (on sale for 239.99 USD, regular price 319.99 USD), M59AS (on sale for 239.99 USD, regular price 449.99 USD), and M56C. The M57 is a popular mesh option at the mid-tier price point. The premium tier includes the C300 series (C300 regular price 559.99 USD, on sale from 279.99 USD), C300 PRO (regular 789.99 USD, on sale from 359.99 USD), C300 PRO V2 (regular 499.99 USD, on sale for 429.99 USD), S300, and the newer B300 PRO line. The menu tags the B300 PRO and C300 PRO V2 as NEW and the C300 and M59AS as HOT, and the header banner calls the C300 Pro V2 the "Premium Pick". Nearly every model is shown with a sale price beside a higher regular price, so the figures here are what the store displayed for the base configuration, not a fixed cost.

Mesh construction and proprietary adjustment systems

Sihoo emphasizes mesh seating across most of its range, particularly in the mid and entry tiers. The M57 model, one of the most popular according to review counts, features a fully breathable mesh design and is priced as the brand's accessible mesh option. Sihoo markets the premium C300 PRO V2 with what it calls "Pressure-relief Cloud Mesh 2.0", a branded mesh name. The company lists several proprietary or branded adjustment systems across its lineup. The M57 specifies 3D adjustable armrests (meaning three degrees of freedom in armrest positioning), adjustable lumbar support, and a recline angle up to 126 degrees. The C300 PRO V2, the flagship model, advertises "Full-body adaptive support with DynaCore synchronized movement," described as coordinating body and chair movement for responsive support. The same model includes "SyncroFlex Back-Glide", which the site says "stays with you as you lean and recline", plus what Sihoo calls "Domino 2.0 lumbar support" that "extends support from your lower back to sacrum". The C300 PRO V2 features 8D armrests (compared to the M57's 3D, suggesting more complex armrest adjustment) and an ultra-wide 3D headrest. The site lists 1.6" of adjustable seat depth on the C300 PRO V2, and its spec table gives a seat depth of 16.9" - 18.5", a seat width of 20.5", a backrest height of 20.5" - 23.6" above the seat and recline angles of 105°, 120° and 135°. The M57 spec sheet gives overall dimensions of 28"W x 28"D x 42"-49"H, a seat depth of 18.11" and a product weight of 44.8 lbs. Neither page states the lumbar travel in inches, and the armrest adjustment ranges are not quantified.

Weight capacity, certifications and customer ratings

The M57 product page gives a maximum load of 330 lbs and says the chair is "Certified by BIFMA and SGS for quality and durability". The C300 PRO V2 spec table also lists "Up to 330 lbs", and that page says the chair was "Tested to BIFMA, SGS, and TÜV standards". For the M18, B100, B300 PRO and the older C300 models, the store listings do not give a weight rating or a certification. The M57 page shows a rating of 4.8 out of 5 stars based on 1,431 reviews. In the product grid, the C300 with Advanced Back Support carries a review count of 1008, the M18 shows 2982, the C300 Pro 239, the B100 151, the M59AS 119 and the newer C300 Pro V2 29. Those are Sihoo's own store figures, and the grid shows the counts without a numeric average for each model.

Shipping, returns, warranty and customer service

Sihoo advertises free shipping to the US and Canada and a 30-day worry-free returns promise; the site does not spell out who pays return freight or how a refund is issued. The company backs all chairs with a 3-year warranty, stated on multiple pages and in the main site navigation. However, the site does not specify what the warranty covers (frame, gas lift, fabric, mechanisms), whether exclusions apply (such as normal wear, damage from misuse or installation errors, or lack of maintenance), or whether the warranty is limited to the original purchaser or transferable. The site lists "Prompt & Reliable Customer Service" as one of its promises and includes contact methods (contact form and "Track My Order" link), and product pages link an Installation Guide, an Adjustment Guide and a downloadable manual, but the site does not publish delivery timeframes. The site mentions bulk order options and a dealer locator and affiliate program, suggesting B2B and partnership pathways beyond direct consumer sales.

Global reach and media presence

The Sihoo homepage reports that products are featured in over 2000 media outlets annually. The company claims to deliver to 122+ countries and have sold over 1.9 million products worldwide per year. The "About" page emphasizes a 15-year commitment to ergonomic innovation and states the company is a "prominent specialist in ergonomic furniture" dedicated to accessibility and comfort. This global scale and media presence position Sihoo as an established ergonomic brand with international recognition, though the site does not name specific media outlets or publications that feature the products.

Strengths and gaps in published specification information

Sihoo's main strength is transparent pricing and free shipping to North America, combined with a 3-year warranty backing all purchases, a 30-day returns guarantee and strong customer satisfaction ratings. The brand offers multiple price points from entry-level models to premium options, and the best-selling models carry large review counts on Sihoo's own store (1,431 for the M57 and 2982 for the M18). The company's 15-year track record, global shipping to 122+ countries and media presence in 2000+ outlets suggest stability and market recognition.

The major limitation is uneven specification detail. The M57 and C300 PRO V2 pages give a 330 lbs load rating, dimensions and recline figures, while the store listings for the other models do not. Armrest travel and lumbar movement are not quantified for any model and are described instead through feature names such as DynaCore, SyncroFlex and Domino. The M57 lists its materials as aluminum and mesh, but the site does not give mesh fiber type or foam density, and it does not say whether the BIFMA testing named on two product pages applies to the entire line. Warranty coverage details (what is included, what is excluded, original purchaser only or transferable, duration in years vs. lifetime) are not published. The site does not state a delivery time from order to arrival. A buyer comparing adjustment ranges across the whole Sihoo lineup will find full spec tables only on some product pages and may need to ask the company for the rest.