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    SIHOO Doro C300 Ergonomic Office Chair with Ultra Soft 3D Armrests, Dynamic Lumbar Support for Home Office Chair, Adjustable Backrest Desk Chair, Swivel Big and Tall Office Chair, Computer Chair

    Limited time offer, ends 12/30 By SIHOO INTELLIGENT HOME

    • Black
    • Gray
    • New Design Ergonomic Chair
    • Innovative Dynamic Tracking System
    • 3D Coordinated Armrests and Adaptive Lumbar Support
    • 3-Position Tilt Adjustment
    • 4-Stage Pneumatic Lifter and Safety Certification
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    Overview
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    Saddle Shape Cushion

    The wide cushion of this computer chair is saddle shaped to fit the curves of your buttocks and legs, effectively relieving the pressure of sitting, providing effective support without putting pressure on your legs, and the high-quality dragon mesh is comfortable and durable, ventilated and breathable, and you won't feel stuffy after a long time of sitting.

    [Dual Backrest Design and Adaptive Lumbar Pillow]

    The backrest of this ergonomic office chair is designed with dual backrests, separated backrests, which fit your back curve better, and adaptive lumbar pillow, which can be adjusted automatically with your body movement, providing continuous support for your lumbar area no matter which sitting position you are in.

    High Quality Mesh Office Chair

    SIHOO M59AS mesh office chair is BIFMA and SGS certified and passed the hydrostatic pressure test of 1136 kg. Our office chairs can withstand up to 150 kilograms of weight. 

    Dynamic lumbar support  Dynamic lumbar support provides adaptive support when you lean back deeply.

    SIHOO Doro C300 The Sit-All-Day Chair


    What it is

    A mesh, high-back task chair that moves with you, not against you. Built for 8-12 hour days of coding, gaming, trading or studying.


    Quick numbers

    4 cm backrest slide (2.36 in) 4 height stops

    110° / 120° / 130° one-touch recline

    3-direction arm shift: 7 cm front-back, 4 cm side-side, 3 cm up-down

    10 cm seat-height range (4-stage SGS gas lift, class 4)

    40 cm seat width, 50 cm depth fits 5'2"6'4" (160195 cm)

    150 kg (330 lb) weight limit

    Noise 25 dB on hard floor casters

    12 patents, TÜV & BIFMA passed, REACH foam-free


    Why it feels good

    1. Auto-following backrest pivots ±15° as you lean, keeping lumbar pillow glued to your spine.

    2. Adaptive lumbar moves 1.5 cm in/out with your hip angle, no manual knob needed.

    3. Armrests recline-synced elbows stay supported at every tilt angle.

    4. Breathable mesh 0.8 mm vent gap, keeps skin temp -2 °C vs foam chairs after 2 h sitting.

    5. Weight-sense tilt no crank: lighter people tilt easy, heavier folk stay stable.


    Whats in the box

    Chair chassis pre-built (back, seat, arms)

    5-star aluminum base (Ø 70 cm)

    50 mm PU casters (soft-floor friendly)

    Class-4 gas cylinder + top cover

    Screw pack + hex key 8 min single-tool build

    Extra set of arm-top caps

    3-year parts card with QR code claim


    Ideal for

    Home office, game station, dorm, coworking hot-deskany place you need forget-its-there comfort.


    Bottom line

    Park your body for a full workday, game night, or binge-watch marathon; the C300 adjusts itself so you dont have to.

    Warranty & Returns

    Warranty, Returns, And Additional Information

    Warranty

    • Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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