Refurbished BackStrong Chair

629 reviews
Pay Once

What’s This?

Our business model allows us to avoid costs brought on by middlemen and pass on the savings to you.


or Pay over time

Refurbished BackStrong Chair

629 reviews
Pay Once

What’s This?

Our business model allows us to avoid costs brought on by middlemen and pass on the savings to you.


or Pay over time

Choose Color: Black Frame with Black Upholstery
Choose Material: Vegan Leather
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(Add Priority Processing for $39.99 to move your order to the top of the processing queue)

10 Minute
assembly time

Proudly based
in the USA


The BackStrong chair is the result of years of testing and tweaking, 15+ prototypes, and over 1,000 patients testing each version.  We are proud to deliver to you this final result!

Your body wasn't designed to sit all day!

Our unique Sit In Motion® technology and its “bottom up” motion is designed to softly cradle your lower back to relieve crucial pressure points throughout your spine and body.  This is the first and only chair that can induce perfect posture for all 33 of your vertebrae!

The BackStrong Chair will:

  • Support ideal posture & movement to increase your flexibility
  • Stimulate circulation to reduce fatigue from long hours of sitting
  • Create movement allowing for an increase of oxygenation and respiration
  • Reduce neck and shoulder strain while you sit

 This BackStrong Chair includes: 

  • Soft high-grade vegan leather upholstery 
  • Foldaway arms allow you to move closer to your work for less strain and less strain on your eyes
  • Pneumatic seat-height adjustment; 360-degree swivel; smooth-rolling casters
  • Assembly instructions included.  It's easy - less than 10 minutes
  • Maximum weight capacity - 275 pounds

Fit Guide:

The BackStrong chair fits into the 95th percentile of human beings, meaning it fits the same rules as automobiles must follow. Only 5% of the population may be too tall, and 5% may be too small. The seat height is 21.75". The range is 18.75"~21.75".

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Limited Lifetime Warranty on all components with a one year warranty on the cushions. *Please note the 60-day refund policy does not apply to Refurbished items because they are non-refundable. purchases come with the reassurance of a 60-day money back guarantee unless otherwise noted at the time of purchase.

If you are not satisfied, you may return the item within 60 days of delivery for a full refund of the purchase price less shipping.

Due to the unique functionality of the SIM (Sit-In-Motion Technology), we request that you keep and use your chair for at least 10 days to allow your body to properly adjust to your All33 Backstrong C1.

If you still wish to request a return after 10 days, please call All33 Customer Service at (855) 976-1690 or send an email to

One of our Customer Care representatives will walk you through all the features and adjustments to ensure you are experiencing all that All33 has to offer.

In the event that a return is required, All33 will send you a return shipping label and instructions to pack up your chair and return it back to us.

All purchases are eligible for an exchange within that same 60-day time frame, a shipping charge for the return shipment still applies.

The item must be returned in like new condition, with all paperwork, parts, and accessories to ensure full credit minus the return shipping charge.

Please call (855) 976-1690 or email for a return authorization and shipping instructions. will not accept any return that is made without a return authorization number and processed through our return service.

While the optimal height range for this chair is 4′ 11 ½″ (151 cm) to 6′ 1″ (186 cm), some of our customers who fall outside of this range have still found it to be a comfortable fit.

The seat height is 21.75″. The adjustable range is 18.75″–21.75″.

Maximum weight capacity 275 pounds.

  • Chair Size

    22 ¼–30″W × 26 ¼″D × 41″–44″H
  • Seat Height

    18 ¾″–21 ¾″
  • Seating Area Depth

    17 ½″
  • From Arm to Floor

    24 ¾″–27 ¾″
  • Seat/Back Cushion Size

    30 ¼″W × 26 ½″D × 18″H
  • Carton Size

    30 ¾″L × 21 ½″W × 26″H
  • Container Loading

    84 / 180 / 239 / 271
  • Weight

    N.W. 48.86 lbs, G.W. 60.28 lbs
  • Foam

    Molded foam
  • Arms

    Solid PU arm pads
  • Gas Lift

    CP-1680-45 (80/185 mm drop down 45 mm)

All refurbished chairs are considered final sale and are not eligible for a return, refund, or exchange. If your chair is damaged or defective, it is still covered under our Lifetime Limited Warranty and we will work with you to replace any necessary parts.


Fit Guide


Return Policy

10 Minute
assembly time

Proudly based
in the USA

Sit in The BackStrong and Gain:

Ideal posture and
greater flexibility

Better blood flow
to reduce fatigue

More oxygen
to your muscles

Relief from neck
and shoulder strain

Backed By Experts

Product Features


Unlike regular chairs that allow you to lean back at unsafe angles, ours was designed to fit the curve of your spine perfectly. This design cradles your pelvis and lower back, causing your vertebrae to stack into ideal posture. Sit back, and you’ll find it’s impossible to slouch. The result? Relief in your neck and shoulders and a difference you can feel.

Made to Move

Our Sit In Motion® technology makes this the only chair in the world that allows natural movement of the pelvis and back. It was built to move and rock with you, stimulating circulation, improving flexibility, and bringing more oxygen to your muscles.

Easy on the Eyes

Foldaway arms allow you to move much closer to your desk and reduce eye strain. Plus, our commitment to making things that last means we source materials carefully to create chairs that look sleek and at home in your space.

60 Day Guarantee

We know you'll absolutely love your chair, but if for some reason it isn't right for you, we’ll refund you the cost of the chair within 60 days of purchasing. Our chairs also come with a Limited Lifetime Warranty on all components with a one year warranty on cushions. For more details about our warranty click here.

How We Line Up


BackStrong C1

Leading Office Chairs

Leading Ergonomic Chairs

  • Induces perfect posture by aligning all 33 vertebrae

  • Revolutionary tech that keeps you in motion

  • Chiropractor designed and doctor recommended

  • Boosts energy through increased circulation and movement

  • Enhances performance and focus, ideal for long hours of work

  • Improves breathing & digestion

  • Sleek and stylish design

  • “Named Best Ergonomic Chair for Back Pain” by Popular Science

Built with Care


Completely adjustable seat-height lever, as well as a 360-degree swivel with smooth rolling coasters.


From product design to technology, we value simplicity. With 6 simple pieces, the chair can be assembled in less than 10 minutes.


All of the components of our products are built with sustainability in mind and are 100% recyclable.

Customer Reviews
4.7 Based on 629 Reviews
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Filter Reviews:
David P.
United States United States

Six-Star Customer Service

I had been using my BackStrong C1 chair for a little over a year or so when I noticed that I was using the lift handle several times a day, something that I hadn't needed to do for the first year. After doing some quick online research, it seemed to be that the gas lift might have been the problem. I reached out to customer service at ALL33 and left a message explaining what I thought the problem might be. Sue, a customer service representative, returned my call within a day. She agreed that the gas lift probably needed replacing and sent me an email to confirm my shipping address (which had changed since purchasing the chair). For whatever reason, I could not replace the gas lift, and Sue didn't give up on me. Instead, she took ownership of my problem and went out of her way to work with me until she could provide a solution. At no time did she suggest that I deal with someone else or tell me she couldn't help me. In a world where customer service is, more often than not, just a department name, Sue representing ALL33 proved that not only does ALL33 stand behind their products, but they also take customer service seriously. And if you don't believe me, give Sue a call.

Carolyn S.
United States United States

Working in comfort

I have been using my chair for about a week and I am so impressed with the comfort. It has helped with my back pain and I definitely do not feel as fatigued sitting all day. And when I stand up (which I know I'm supposed to do often) I do not feel as "crickety". Overall I love it!

Gay C.
United States United States

Excellent chair!

I've invested in chairs that boasted good for your back in the past, yet they would still cause pain in the "buttocks' and/or 'tailbone' areas. This chair does not create any of that pain and provides strong support for the back. I have had two back surgeries and it is difficult to find a chair that provides the support I need. This chair provides 100% support and helps me sit straight and strengthen my spine. It is a good looking chair and fits well in my office. Now I wish that All33 would design a chair with the same good features that would fit in with the décor in my TV room. That way I would have the type of support I need during all my waking hours. This is the best investment I have made since my back surgeries.

Barbie C.
United States United States

Worth it for your back

I chose this chair after reading reviews and the story behind this chair. My old chair was hurting my back every time I left my chair, it was hard to stand up. My lower back pain went away by the 2nd day of using my new all33 chair. Purchased more of these chairs for the women in my office.