No, we do not offer free trial prior to purchase.

No, we do not currently have physical store locations. We only sell online.

We ship from the warehouse closest to you either in Los Angeles, New Jersey or Chicago.

Our products require some assembly, but it's easy and you can do it yourself.

The order confirmation and tracking number will be provided after checkout. You will receive an email as soon as the tracking number is created which typically is within 1-2 business days.

We do not require you to sign for the shipment.

Yes. We can take phone orders. Please call us at (855)-223-6010.

We offer financing thru Affirm and full details are available on our website.

We accept Visa, MasterCard, American Express, Discover, PayPal, Amazon Pay, and Affirm. These are all available in checkout process.

Products are made in China.

The All33 moves all 33 bones in your back to assist you with proper posture and give you a sense of relief, unfortunately spending much of your day in a seated position can leave your spine sore, stiff, and in pain because you are putting stress on the muscles and discs of your back and neck. This position results in tightness of your hip flexors such as the iliopsoas muscle and pressure and some ischemia (restricted blood flow) of your buttock muscles—the gluteus maximus. This muscle is an important supporter of the spine.

The human spinal column is made up of 33 bones - 7 vertebrae in the cervical region, 12 in the thoracic region, 5 in the lumbar region, 5 in the sacral region and 4 in the coccygeal region.

BIFMA tested to 275 lbs

There is no set limit to the sitting time but we encourage everyone to get up and move around at least 1x an hour.

The arms are designed to flip up out of the way. They are NOT designed to go up or down - and they do not move side to side. Future models may include this but studies out of Europe say the change in height on the arm rest does not create an ergonomic benefit. Also, the trend to toward more people using a lower keyboard which does not work with arm rests. Currently ours is designed to slope downward to accommodate different heights.

No, the lumbar support is not adjustable

Standing means your joints are weight bearing and that leads to compression and degeneration. Your circulation is static and increases the load on your heart to return blood up, against gravity to your lungs. The answer is to keep yourself moving, sitting and standing, but if you have to sit, sit in a chair that lets you move!

We have designed the chair to fit 95% of the size population, which is exactly how car seats are designed and most chairs.

The chair comfortably fits the 5th percentile female to the 95th percentile male. These are automotive standards that engineers use when configuring interiors. They are not required to reach the short females, under 59.6 inches or = 4.96 ft are they required to fit the tall male over 73.4 inches = 6.1 ft

The seat pan is 17.5 inches wide, and 23 inches inside the arms.

1. Knitted fabric - A knit fabric has 3-way stretch that conforms to the cushions and gives when you sit. This can actually result in a chair that feels softer and we highly recommend it for any chair that has memory foam cushions.A knit can also breathe better than a woven fabric resulting in a chair less likely to get hot. Knits made for upholstery are durable, easy to clean and wear well.

What is the material? Polyester

What is the weave? Plain weave

Water proof/water resistant? Yes

Stainproof/stain resistant? Yes

2. Ultraleather / Vegan Leather - Today's synthetic leathers feel great and wear very well, often longer than real leather. Ultraleathers are easy to clean and some are anti-microbial making them excellent for healthcare. Ultraleathers breath well offering a cooler chair than real leather. Good looks make this a great choice for the person who loves leather but wants to be animal conscious. Ultraleather also gives with the cushion offering a softer "sit."

1. Tilt greater than permitted causes excessive extension of the lower spine and possible impingement of the facet joints.
2. Tilt greater than permitted causes the sitter to slide out of the lower back support mechanism and defeats the purpose
3. Creates a danger for pinch injury in the front of the chair.

To remove the seat plate from the gas lift: you will need to turn your chair over.
Next, get a hammer. You will want to hit around the area that the gas lift (Cylinder) goes inside the seat plate (The black metal plate attached to the seat that has a handle and a knob). After you hit the seat plate, give the gas lift a pull and see if it is coming loose. These two items are locked together by pressure; the more you hit the seat plate the more pressure will be released. Eventually the two items will separate.
To remove the gas lift from the five star base: please turn the chair upside down. There are about one to two inches where the gas lift (Cylinder) goes through the 5 star base (The legs with wheels). Next, grab a hammer. Then, if you look in the center of the gas lift, there is a little clip.
You DO NOT want to hit the clip in the middle as it will release the pressure needed in order to raise or lower your chair. You will want to hit the outer edge or the rim of the gas lift. The more you hit the gas lift the more pressure will be released. After you give the gas lifts a few hits, it should come right out, or give it a pull and see if it’s loose.

If it still won’t budge, give us a call or feel free to email us at support@all33.com.

Here are some videos with instructions as well:

**Gas Lift Removal:** [http://www.youtube.com/watch?v=kpsuli2L-_E](http://www.youtube.com/watch?v=kpsuli2L-_E)
**Base Removal Video:** [http://www.youtube.com/watch?v=QhNHbsZpuTw](http://www.youtube.com/watch?v=QhNHbsZpuTw)

Make sure you are following the "Second Sit" approach
That is to say your buttocks were not nestled back into the chair bucket far enough. This causes you to sit much like you did in a conventional chair with the weight of your upper body delivered through directly to your sit bones. This will make the seat pad feel hard!

It will also cause the back support to push directly into your upper lumbar spine - which won't feel good.

When you take a second sit approach your sit bones will be alleviated from this body weight pressure.

To "Second Sit", take a first sit.. then put both hands on the armrests and scoot your rear back into the crevice formed between the back support padding and the seat padding. This effectively locks your pelvis in place providing a natural lumbar spine curve

*Watch this Video to see how to do it: https://vimeo.com/324000551

Allow for a "break in" period.
If your back is sore, it may be because this is the first time in a while that you are sitting with improved posture. Your spinal muscles could be deconditioned. When you sit in this chair, your spinal muscles will be exercised and this could cause you some pain, much in the same way you would feel pain in your chest if it was the first time in a long time you visited the gym and did some bench pressing.

In this case your best approach will be to break your sit time sitting in the chair gradually while your muscles are reconditioned. In most cases this pain will subside and you can rest comfortably knowing your spinal muscles are stronger as a result of exercise. In a rare case where that pain continues, we recommend you visit a medical professional to review your specific condition as the pain could be an indicator of an underlying issue that could require treatment.

Some have commented on the forward tilt travel of the seat pan being more aggressive in the prototype than in the final production model.

The prototype did in fact have a slightly greater degree of forward tilt. However, our testing with patients found that people who had hip disease could not sit comfortably for extended periods as the hip joint was forced into unhealthy flexion.

Also, in the redesign of the chair to its final production model, we made substantial changes to the entire frame and seat travel to avoid potential pinch points that could harm a user.

There are two more reasons we limited the forward tilt:

1. Tilt greater than permitted causes excessive extension of the lower spine and possible impingement of the facet joints.
2. Tilt greater than permitted causes the sitter to slide out of the lower back support mechanism and defeats the purpose

The average (normal) lumbosacral angle is 15 to 20 degrees. With a seat pivot angle greater than that the sitter would could slip forward out of the chair seat. Therefore we opted for the safest and most universally acceptable angle of of tilt.

However, we have discovered that if your upper body weight is substantially greater than your lower body weight, the pivot may not engage as preferred. It is possible that a seat bolster that lifts your pelvis higher in the seat bucket could correct the problem.

We are experimenting with this feature as we speak, and we are looking at developing quick solutions for this as well as looking at how we can develop a feature such as this directly into the chair.

- Make sure you mounted the Tilt mechanism properly!