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

Your body may be very used to poor sitting posture from years of improper sitting. When sitting on the All33 chair for the first time, first few days, or even weeks, you may find that your body is engaging muscles that have not been used in a long time (or ever!). These will be the muscles that are supposed to be used when sitting to hold your body and back erect. Since they have likely not been used - or exercised - in this way - it is much like the experience one would have when going to the gym and lifting weights for the first time in a while. Your muscles may feel sore when being triggered and used for a bit.

If your soreness or discomfort continues for a longer period, we urge you to consult a medical professional to diagnose your specific condition and situation.

Corporate Office Mail Address: Simtec LLC c/o Peak Wellness 144 S Beverly Drive, Suite 400 Beverly Hills, CA 90212 Address

Return Address: Simtec / All33 Customer Service 7850 Ruffner Ave, Van Nuys, CA 91406

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

We have made the chair as green as possible. The plastic used in the chair is recyclable, but most significant is the fact that the upholstery pieces are replaceable. We are sick of seeing chairs discarded in back alleys. With the All33 chair you can replace the upholstered components for a refreshed seat!

1 Year Limited Warranty with manufacturer of chair

We will provide full refunds on your chair if you are not satisfied upon receipt of the chair back in our warehouse.

Yes from 60 days from your receipt of the chair.

If you have not opened and assembled the chair:

Simply return the chair to us and we will promptly issue a full refund on receipt.

If you have assembled the chair:

You must first contact All33 Customer Service at (855)976-1690 to get an RMA# and authorization to return the chair. With authorization you will be responsible for shipping the chair back to our warehouse in good condition. Upon receipt and inspection of the chair we will promptly issue your full refund.

Internal Rules: With a request for a return - please go to a downsell tactic first:


We will consider returns for crowdfunders on a case by case basis. Crowdfunders would have 30 days max. With authorization crowdfunders will be responsible for shipping the chair back to our warehouse in good condition. Upon receipt and inspection of the chair we will promptly issue a full refund for the pledge amount.

We cannot accept returns from Crowdfund deliveries outside of the US.

The prices from the crowdfunding campaign varied greatly depending upon the time at which pledges were made to the number of chairs ordered, to the location, and the platform used (Kickstarter or Indiegogo). These prices are NOT the retail price of the chair and were artificially low as part of the crowdfunding process.

Each Chair is packed in a single box. Box size:

in CM : 78.1X 54.61 x 66.04

In inches: 30.75”*21.5”*26”

CUFT = 9.64'

CBM = 0.28

GW = 27.4 K / 60.23 LBS

NW = 21.3 K / 46.86 LBS

The arms on this model are designed to flip up out of the way.

The 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.

The arms on this model are designed to flip up out of the way.
The 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.

Here is what Ergonomists have to say about armrests

Armrests may encourage the worker to abduct the shoulders (elbows away from the sides). The forearms then approach the keyboard on an angle, which requires the wrist to bend in order to type. This type of wrist bending can increase the risk of tendonitis. Armrests may create pressure on the soft tissues of the forearm and elbow, particularly if they are hard, or if they are used to rest an elbow in a “thinking” posture. Armrests may encourage the worker to rest the entire forearm on the armrest, and operate the mouse or keyboard by wrist and finger movement alone (with a “windshield wiper” action). This posture also can be associated with tendonitis. Armrests may force the worker to sit further away from the work, and reach to type and mouse, such that the shoulders are flexed (elbows forward from sides). This posture does not require muscle effort while the arms rest on the armrests, but the muscles do have to work much harder every time the hands move between positions (i.e. keyboard to mouse). To be useful as a “rest”, the worker typically adjusts the armrest to elbow height. However, this is generally the same height as the keyboard/mouse surface. The armrests often strike the work surface when the worker attempts to tuck the chair in close to sit in a “good” position; by the end of the day, the worker has given up trying to sit close to the work, and leans, perches or slouches in the chair.

Further there are situations where a pregnant or obese worker often cannot sit close enough to a keyboard to work with the upper arms close to the body. Sometimes, workstation constraints prevent us from bringing the work close. For example, dental hygienists have to work in the patient’s mouth, and it’s not possible to position the patient’s head between the hygienist’s body and hands; s/he will always be required to reach forward and/or upward.

We concede, in these situations, that there is a place for armrests. It’s better to support the weight of the arms on an armrest than to suffer a prolonged static muscle exertion while holding the arms in a raised position. Similarly, if armrests are causing no harm, we wouldn’t have them removed. Many people, particularly those with hip or knee problems, need armrests to assist them with getting in and out of a chair.

We have positioned our arms in the most optimal location to fit a broad percentile of users, also considering the arm location in regards to the desk. We want users to be comfortable moving close to the desk and not having interference with the arms. If this interference is a problem based on the desk or the chair height we have made the arms fold completely out of the way giving full access to the work area.

Anatomically the shoulder and arm are subject to gravity as they hang from the thorax and neck thru muscular attachments. In the typical stooped forward position the weight of the shoulder arm girdle is positioned forward of the neutral gravity line causing increased loading on the thorax and spine. However, the ALL33 automatic positioning of a sitter’s neutral posture lifts the user’s chest and moves the head posture backwards of the shoulder thereby positioning the shoulder girdle behind the thorax so that the shoulder and arm pendency on the muscular attachments to the user’s neck is substantially reduced. ALL 33 is on the forefront and breaking the mold on ergonomic recommendations!

With all of the above being said, and regardless of the ergonomic data, we have heard from a number of you that having adjustable arms is very important to you - so we are looking at putting them in future models.


There is no headrest at this time. We will consider including one in future designs.

The reason there is no headrest at this time:

Picture your vertebrae as links in a chain, with each spinal region made of multiple “links”. When one link moves, it affects the others. In biomechanical terms, this is referred to as a kinetic chain. The base of our spinal kinetic chain is the pelvis. If the base is well supported, then the rest of the “links in the chain” have the foundation to be supported as well. This is why it is important to sit back in your seat- to allow the pelvis to be supported in your chair, and provide the foundation for lumbar, thoracic and cervical support. This effectively eliminates the need for a head rest. ALL33 instantly reacts to give you a neutral spine posture and thus eliminates the benefits of a head rest.

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.

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.

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."


What is the material? Polyester

What is the weave? Plain weave

Water proof/water resistant? Yes

Stainproof/stain resistant? Yes

Any other particulars? Can pass color fastness test such as dry/wet crocking, abrasion, tensile strength, UV lighting test.

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.

Raising or Lowering you chair is accomplished by lifting the height adjustment lever and letting go. The chair will lock out at the height you select. If it does not lock out then a defective shock cylinder is the issue.

To Lock Tilt of the entire chair simply push in the height adjustment lever. To unlock and allow chair tilt simply pull out on the height adjustment lever.

To Adjust the Whole Chair Tilt simply turn the round knob on the underbelly of the chair clockwise to get more freedom of tilt and counter-clockwise to increase stiffness of tilt. The ideal tilt is the sweet spot of sitting wherein your body finds a natural resting place that encourages you to move more.

To tilt the seat pan forward simply move your legs forward and vice versa to tip the seat pan backwards.