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Every person is unique so a “one size fits all” option shouldn’t really be an option at all. An essential element to providing all-day comfort is our signature molded contoured seat designs reduce seated pressure on the sit bones and soft tissue around the thigh and buttock area which helps to distribute weight more uniformly. Choose the size that best fits your needs.

  • standard

    Standard Seat

    Our signature molded contoured seat designs reduce seated pressure on the sit bones and soft tissue around the thigh and buttock area, which helps to distribute weight more uniformly. Our standard seat. Medium contouring (21”W x 20”D).

  • deep_seat

    Deep Contour Seat

    Our signature molded contoured seat in a wider and deeper seat. Pronounced contouring (24”W x 20”D). More Seat Sizes also available.

    *This will be added to your order. It does not display.

  • coccyx

    Coccyx Rear Seat Cut out

    Relive sciatic pain by eliminating contact pressure on your tailbone, eliminating vertical pressure up the spine. Watch Video

    *Not combinable with Core-flex® seat option.

    *This will be added to your order. It does not display.

  • core_flex

    Core-Flex® Seat

    Sitting in motion helps promote healthy circulation. Core-flex® natural movement stops the unnecessary load of static positions by activating the leg muscles and core. Watch Video

    *Not combinable with Coccyx (rear seat) cut out.

    *This will be added to your order. It does not display.


Carpet casters are designed for use on medium to low-pile carpet.

Soft Wheel

Designed for use on all hard flooring types, including but not limited to; plastic chair mats, wooden, tile and concrete.

LF Wheels

Made with a soft, polyurethane material, move effortlessly on almost any surface - tile and carpet alike, gently on easily-scratched surfaces like hardwood and vinyl.

Polished Aluminum

Offering a modern and contemporary appeal with a silver accent. Base comes standard with chrome hooded carpet casters.


Classic and Traditional. Complete the look with warm natural wood accents in your choice of.

[threekit] Ultimate Executive Mid-Back Ergonomic Office Chair - 2490


The world’s most customizable office chair. 

  • FREE Shipping to the contiguous US and Canadian Provinces.
  • The 2490 Ultimate Executive comes with a 10-year limited warranty.  
    UPHOLSTERY:Premium Leather (+$800)
    COLOR:Tribeca Cream

    Free Shipping in Canada

    30 Day Money Back Guarantee

    10 Year Limited Warranty

    Girl sitting in a Mid-back Chair

    Build the Chair that’s best for you.

    At LIFEFORM®, we believe that your office chair should be tailored to meet your individual needs. That's why we offer an array of customizable options to create a chair that is perfect for you. Our ergonomic adjustments ensure a comfortable fit for your body, while advanced options like seat angle, lumbar support, arm configuration, and height allow for precise adjustments. You can even add extra comfort features like alternative seat options and adjustable arms. With LIFEFORM®, you'll feel like your office chair was designed just for you – because it was.


    Chair Details

    Included Features
    • Lateral Shaped Back with LIFE-Foam™ Memory Foam
    • 100% Recycled Plastic Back Frame 
    • Schukra Adjustable Lumbar Support
    • Ratchet Back Height Adjustment
    • Independent Back Angle Adjustment
    • Upholstered LIFE-Foam™ Memory Foam Arm Pads
    • Ergo-M Arm Pads with Swivel Function
    • Clip Height and Fly Wheel Width Adjustable Arm Brackets
    • Contoured Seat Pan (21” W x 20” D)
    • LIFE-Foam Memory Foam Seat with 2” High Density Foam Core
    • Waterfall Seat Edge
    • Multi-Function Knee Tilt Control Mechanism
    • Tilt & Tilt Lock Function
    • Tilt Tension Adjustment
    • Seat Height Adjustment
    • Gas/Pneumatic Lift Height Adjustment
    • 3” Seat Slider Depth Adjustment
    • POP 27” 5 Star Wheel Base
    • 65mm Dual Wheel Carpet Casters

    Weight limit: 350 lbs.
    Recommended height: 5′ – 6’5”

    Total Height 41” –  46”
    Back Height 23” – 25.75”
    Seat Height 19” – 21.5”
    Width Between Arm Pads 17”-21”
    Seat Width 21”
    Total Depth 23.75” – 25.75”
    Seat Depth 20”
    Arm Pad Height from top of seat 6” – 10”
    Total Width 25.5” – 29.5”
    Arm Pad Length 11.5”
    Back Width 21”
    Arm Pad Width 4.5”

    Chair Functions

    The LIFEFORM® Chairs 2490 Ultimate Mid Back is an ergonomic office chair designed to provide maximum comfort and support for long hours of sitting.

    The chair features a contoured mid back design that supports the natural curve of your spine, promoting good posture and reducing the risk of back pain.

    The seat cushion is made of a combination of 2” high-density foam at the core, which provides excellent support and resists compression over time.  A 1” layer of memory foam ensures all day pressure relief and enhanced comfort.

    The chair is also equipped with a tilt mechanism that allows you to adjust the angle of the seat and backrest for optimal comfort.

    Chair Functions:
    Forward Tilt Lockout:
    allows users to engage or lockout Forward Tilt feature. Forward Tilt Function allows the chair to tilt forward so the user may achieve a comfortable working position that maintains proper circulation, reducing pressure on legs and thighs.

    Tilt Lockout: allows the user to freely rock forward, backward or lock the chair into any comfortable position.

    Seat Height: the gas/pneumatic height adjustment allows you to raise or lower the seat to the perfect height.

    Back Angle: allows the user to adjust the angle of the backrest while seated. 

    Back Height: this allows the user to adjust the height of the backrest while seated. Simply lift the backrest upwards to reach the desired height.

    Tilt Tension: allows the user to adjust the ease of recline. The tilt Tension Handle is located on the left side of the mechanism. Turning the handle clockwise or counter-clockwise increases or decreases the tension.

    Seat Slider Function: allows the user to adjust the seat depth as preferred or for multi-user situations.

    Adjustable Lumbar Support: allows users to increase or decrease lumber pressure.

    360 Degree Swivel: Your LIFEFORM® chair rotates 360 degrees without obstruction.

    Height and Width Adjustable Arms: allows arm height and width adjustment.

    Arm Swivel: arm pad swivels inward and outwards.

    How To Adjust the Ultimate Executive Office Chairs

    These chair adjustments are aimed at promoting comfort and support during prolonged sitting and to alleviate pain.

    Add More Comfort & Get Pain Relief

    Every person is unique so a “one size fits all” option shouldn’t really be an option at all. The LIFEFORM® modular design allows people of all different shapes and sizes to create an ergonomic chair so they can sit comfortably. Whether you need support for an existing condition, a past trauma, prevent injury or simply want to find a chair that fits you right – small and narrow or you’re big & tall. We can help you get the best fit, unique to you.

    Deep Seat

    Overall, the Deep Seat option is an excellent choice for those who value comfort, posture, and accessibility. With its extra depth and width, this seat option can provide a more comfortable and supportive sitting experience, while also offering a range of health benefits. A wider and deeper seat option. Pronounced contouring (24”W x 20”D).

    Available only with Memory Foam.

    Coccyx (Rear Seat) Cut Out

    Consider choosing a chair with a coccyx rear seat cutout to relieve pressure and pain on your tailbone, especially if you experience sciatic pain or have a bulging disc in your lower back. The coccyx cutout provide multiple benefits, including alleviating pressure on the tailbone, improving posture, and providing additional support, which can reduce discomfort, pain, and stiffness in the lower back and hips.


    Increased circulation by incorporating a small range of natural motion into a chair so core muscles are stimulated allows for improved comfort. Research also shows that movement is also important for thinking and creativity, spinal fitness, and the maintenance of a healthy metabolism. *Not combinable with Coccyx (rear seat) cut out

    360º Extension Arm

    Gives you 360 degree adjustment - allowing you to set the arm pads close to your body or position them in front of you to rest on while you type, etc.


    Maintaining proper cervical alignment while working helps reduce the strain on the neck muscles and ligaments, which can prevent discomfort and pain. Our Latitude Headrest offers almost infinite head and neck positioning for even more ergonomic support. The headrest is styled to match the Ultimate Executive Mid-Back chair and is available with black or silver finishes.


    ThermaGuard™ is a PCM’s (Phase Change Materials) which will actually absorb body heat - keeping your body temperature neutral and comfortable. This continuous cycle manages temperature over the extended periods for the life of the product.

    Style & Personalization

    Add a touch of style and personalization to your 2490 Ultimate Executive Office Chair with our customizable options. Choose from a variety of finishes to create a chair that suits your individual style and complements your workspace.


    Tribeca is one of our semi-aniline collections. Available in an extensive colour palette that includes soft neutrals as well as bright colours, it is marked by a silky smooth and drapey hand that exudes a more modern aesthetic. Offering colour consistency throughout the hides, it is ideal for high-traffic applications.

    Vegan & Green

    Brisa is one of our most popular fabrics. It features the first premium polycarbonate resin surface with a unique ventilation system that actually breathes. The result of this technological breakthrough is exceptional comfort that becomes a most welcome part of your life. All UltraFabrics are odourless, and allergen-free. These materials assure a sustainable presence, are PVC-free and do not contain POPs, formaldehyde, heavy metals or phthalates.

    Two Fabric Options

    Intuition is a woven fabric with an acrylic backing and stain repellent treatment that features a tweed-like appeal and offers a more residential type aesthetic. Dream Weave patterns are high-performance 4-way stretch knit fabrics that allow extra comfort and movement to enhance the performance of our LIFE-Foam™ Memory Foam. There are few to no seams. Dream Weave fabrics produce little to no waste during production. And are made with 100% Post-Consumer Recycled Polyester and are Certified Carbon Neutral.

    Embroider A Monogram, Logo Or Design

    Take your chair to the next level of sophistication. Make it truly unique by personalizing it.

    Wood Upgrade

    Complete the look with warm natural wood accents. The 5 star base is covered in solid wood caps. Choose from Gray, Black, Cherry, or Walnut color.

    Casters - LF Wheels

    Upgrade your chair’s performance and create a better experience with proper friction on almost any surface.

    Want More Design Options

    Our team of experts will work with you to design a chair that not only looks great but also provides the comfort and support you need to stay focused and productive. Don't settle for a generic office chair - make it your own with the Ultimate Executive 2490 mid back office chair.

    Contrast Stitch

    Bring an understated but up-scale tailored look to your chair with the addition of stylish contrast stitching. This option is a more subtle way to highlight the architecture and adds that extra hint of finesse, to finish first-rate craftsmanship.

    Contrast Piping

    Contrast Piping adds an element of traditional sophistication to your chair, tracing every curve or angle with a bit of highlighting. It brings out the shapes, playing up the graceful contours of your chair.


    Quilting is sewn with painstaking attention to detail, making your chair truly iconic. Quilting options and availability differ by model.

    Embossed Leather Two-Tone

    Same as regular Two-Tone Combinations but with the use of Premium Embossed Leathers.

    Two Tone Contrast

    Personalize your upholstery with Two-Tone color contrasts. The only limit is your imagination!

    Sports Car Pattern

    Give your chair a unique sporting look with a trifecta of quilting, contrast stitching and contrast piping.

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    Still Unsure which chair is right for you?

    Reach out to us and we will guide you to finding your perfect office chair.