Sihoo M57 Ergonomic Advanced Version Reclining High Back Office Chair (Steel Feet｜Active Armrest｜3D Spine Protection)

BIFMA Standard・EN European Standard American Furniture Association BIFMA ×5.1-2017 Standard Test European Standard Test EN1335-2

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Can stand the baptism of time
Groundbreaking two-way adjustable patented lumbar support
The initial angle of the 110° gold backrest and the distinctive ergonomic surface design create a comfortable classic symbol in the engineering chair industry

don't pick someone's back
The two-way engineering lumbar support can be adjusted up and down, forward and backward, adapting to different heights and shapes, and accurately supporting the lumbar spine.
＊Utility model patent: ZL 2014 20628431.8

Comfortable waist fit
The micro-curved surface design conforms to the waist curve, and the thickened cushioning and pressure-relieving cotton can support the lower back in real time.

No need to get up or sit down to adjust more accurately
Find the support position, stretch up and down, and adjust the height of the lumbar pillow.

Adjust the supporting force
Adjust the front and back depth of the lumbar pillow by turning the left and right knobs.

10 major adjustment experience is in place

1. headrest swivel
2. headrest lift
3. Arm lift
4. Front and rear armrests
5. armrest left and right
6. waist up and down
7. waist back
8. Seat height lift
9. Lean back elastic
10. Telescoping pedals

Accurately fit the cervical spine, support the head to relax
Lifting/rotating headrest, flexible angle adjustment, fully fit the neck, support and relax with full care.

Abundant adjustment and smooth support
Humanized 3D armrests, multi-angle support to meet the needs of hands, relax shoulders and arms, focus on efficient output.
7cm up and down lift
35° left and right rotation
6cm slide back and forth

Buttocks, thighs, all-in-one comfort
The curved surface cushion naturally fits the sitting posture of the human body, disperses the pressure on the buttocks, and brings deep relaxation.
Sit lightly on your legs and enjoy a good state. The front of the seat cushion has built-in elastic shaping cotton.

Patented diamond-shaped backrest design Diamond-shaped double-back structure, mechanical strength support, strong and stable.

126° recline
The body and mind are pleasantly stretched, leaning back in three gears, relaxing layer by layer, stretching the pedals, and switching the lunch break mode.

After quenching and strict quality control
The whole mesh is breathable, leaving only freshness Carefully selected dragon pattern mesh, tight weaving process, flexible, soft and elastic when sitting, microporous breathable, no stuffy when sitting for a long time, comfortable experience at all times.

Strength test of non-fracture and anti-deformation mesh

Impact test of load-bearing strong non-collapsing seat surface

Abrasion Test of Rubbing and Color Fastness Mesh Fabric

BIFMA X5.1 standard repeatedly tested, three-stage air pressure rod. Safety and quality assurance.
120,000 lifting tests

Thickened steel chassis · Steady, stable and smooth handling, solid basic skills.

The high-strength aluminum alloy feet are integrally die-cast, high load-bearing, and will not mess up under heavy pressure.
2200 catties static pressure test

Product parameters

• Dimensions: 110-132 x 66 x 64cm
• Height adjustable: 22cm
• Cushion Width: 51cm
• Chair back height: 64.5cm
• material: metal
• Metal Material: Steel
• Fabric Material: Mesh
• Whether it can be lifted: yes
• Is it rotatable: yes
• Whether it can lie down: yes
• Five-star foot material: steel foot
• Armrest Type: Active Armrest
• Whether to support ergonomics: yes
• Due to the fact that the size is all measured by hand, there may be slight errors, please refer to the actual product
• Made in China, or contain simplified Chinese packaging and instructions
• The design is safe, non-toxic and odorless. The special wear-resistant surface treatment is not easy to be stained with dirt, and it is easier to clean. In addition, the concave-convex design is helpful for anti-slip and fixation.