SINC Air
Best starting point if you naturally sit slightly reclined and want a lighter, more relaxed Smart-Glide experience.
Six Smart-Glide chairs. Six different sitting characters.
SINC Air, SINC Lite, SINC, SINC 2, SINC 3 and UltraSinc share the same movement-focused philosophy, but they are designed for different support preferences, working styles and body-fit needs. Compare the differences that actually matter before deciding which model belongs on your shortlist.
This guide is based on current Niture SINC Series specifications, product testing, showroom fitting experience and ongoing product updates.
If you already know the kind of sitting experience you prefer, use this section to narrow the six-model SINC family before reading the detailed comparisons below.
Best starting point if you naturally sit slightly reclined and want a lighter, more relaxed Smart-Glide experience.
Best starting point if you want the essential, work-oriented Smart-Glide experience at a more accessible level.
Best starting point if you want an all-round balance between focused work, movement and supported recline.
Best starting point if you prefer stronger lower-back contact and a more upright, support-focused working feel.
Best starting point if you want a firmer, more substantial chair with greater overall support confidence.
Best starting point if you want Niture’s most complete combination of premium adjustment, movement and coordinated support.
| Model | Best Starting Point For | Sitting Character | Main Reason to Choose It | Recommended Height | Max Load |
|---|---|---|---|---|---|
| SINC Air | Relaxed home-office and lifestyle use | More reclined, light and flexible | Most relaxed SINC sitting character | Approx. 160–190 cm | 110 kg |
| SINC Lite | First serious ergonomic upgrade | Practical and work-oriented | Accessible Smart-Glide experience | Approx. 155–190 cm | 130 kg |
| SINC | Everyday work, movement and recline | Balanced and versatile | Safest all-round starting point | Approx. 150–190 cm | 130 kg |
| SINC 2 | Focused work and stronger lower-back control | More upright and back-support focused | More noticeable lumbar contact | Approx. 145–190 cm | 130 kg |
| SINC 3 | Intensive daily use and firmer support | Firm, stable and substantial | Greater support confidence and solidity | Approx. 160–190 cm | 130 kg |
| UltraSinc | Premium long-hour work and movement | Refined and highly adjustable | Most complete SINC experience | Approx. 155–190 cm | 130 kg |
On mobile, swipe horizontally to see all comparison columns.
SINC Air: choose it if you naturally sit more reclined.
SINC Lite: choose it if you want the most accessible work-oriented Smart-Glide entry point.
SINC: choose it if you want the most balanced all-rounder.
SINC 2: choose it if stronger lower-back control matters most.
SINC 3: choose it if you prefer a firmer, more substantial chair.
UltraSinc: choose it if you want Niture’s most complete premium adjustment package.
Use these recommendations as a shortlist, not a fit guarantee. Final fit still depends on how the seat, lumbar support, armrests and headrest align with your body proportions.
Every current SINC model is built around the same core idea: support should move with the user instead of expecting the user to remain in one fixed posture.
Smart-Glide allows the backrest to move with the user as posture changes, helping maintain closer back contact during leaning, recline and the return towards the desk.
All Smart-Glide chairs can remain locked in the original upright position when a more conventional fixed-backrest feel is preferred, or Smart-Glide can be activated through its control.
The seat and backrest move through a reclined position so the user can shift away from a fully upright working posture.
The backrest adds its own movement relationship, helping support stay more connected as the body moves.
What separates the six models is not whether they have Smart-Glide. It is how Smart-Glide works together with each model’s lumbar system, backrest shape, armrests, sitting angle, firmness, material and adjustment range.
SINC Air sits at the more relaxed end of the SINC family, with a naturally easier lean-back character for users who do not spend the entire day in a strongly upright task position.
It suits home-office users who move between desk work, online meetings, reading, browsing, content viewing and casual gaming. Its synchronized arm support also becomes useful during recline because the arm position moves more naturally with the body.
You spend most of the day doing intensive upright keyboard-and-mouse work, prefer stronger lower-back contact, or want a firmer and more substantial sitting feel.
In those cases, compare SINC, SINC 2 or SINC 3 before deciding.
SINC Air is not simply an entry-level SINC. Its more relaxed sitting character gives it a distinct role in the family. Buyers who naturally prefer reclining may find it more suitable than a more work-focused model, even when their budget allows them to move higher in the range.
SINC Lite is the most accessible work-oriented entry into the SINC family—built for users who want meaningful ergonomic adjustment and Smart-Glide movement without moving immediately into the more specialised models.
It is particularly relevant to someone upgrading from a conventional office chair or gaming chair and wanting better seat fit, back support, arm positioning and movement throughout the working day.
The backrest can move with posture changes while still allowing the Smart-Glide function to remain locked upright when preferred.
Seat-depth adjustment, adjustable back support and a neck-focused headrest help the chair adapt to different body proportions.
6D armrests support different desk, keyboard, mouse, phone and recline positions throughout the day.
You want a fuller all-round experience, stronger lower-back control, a firmer sitting character or the most complete premium adjustment package.
In those cases, compare SINC, SINC 2, SINC 3 or UltraSinc.
SINC Lite is not simply a stripped-down SINC. Its role is to deliver the core Smart-Glide experience and the adjustments most users need for everyday work, while keeping the chair more accessible than the fuller or more specialised SINC models.
If you are unsure where to begin in the SINC range, SINC is the most balanced starting point.
It does not lean as strongly towards relaxed sitting as SINC Air, pronounced lower-back control as SINC 2, firmer support as SINC 3, or flagship complexity as UltraSinc. Instead, it is designed to move comfortably between focused work, posture changes and supported recline.
The lumbar system is designed to support everyday posture changes without creating an excessively aggressive or highly specialised lower-back feel.
SINC is designed for users who move between desk work, meetings, gaming, light recline and short recovery periods throughout the day.
Wintex Mesh is used across the main support surfaces, giving SINC a more premium material position than the entry-oriented SINC Lite.
You already know you prefer a more specialised sitting character.
Compare SINC Air for more relaxed sitting, SINC 2 for stronger lower-back control, SINC 3 for a firmer and more substantial feel, or UltraSinc for the flagship adjustment package.
SINC is the benchmark model in this comparison. If you do not yet know whether you want a relaxed, lumbar-focused, firmer or flagship sitting experience, test SINC first and use its balanced feel as the reference point for the other models.
SINC 2 moves away from the neutral all-round character of SINC and places greater emphasis on lower-back contact and control during focused work.
Its Twin Dynamic Lumbar Support creates a more defined support relationship around the lower back, making SINC 2 particularly relevant to users who prefer the backrest to feel more present rather than subtle.
Two lumbar support sections create more defined contact around the lower back than the more neutral adaptive character of SINC.
Lower-back support can be adjusted manually so the user can tune how closely the lumbar system meets the body.
Wintex Mesh is used across the main sitting surfaces, combining the support-focused design with breathable mesh construction.
You prefer a more neutral all-round sitting character or want a firmer overall chair rather than specifically stronger lumbar control.
Compare SINC for balance, SINC 3 for greater overall firmness, or UltraSinc for more complete premium adjustment.
Like the other Smart-Glide models, SINC 2 can be locked in its original upright position or released for movement. SINC 2 additionally provides a second Smart-Glide lock position at the lowest glide position, giving users another fixed-backrest option within the Smart-Glide range.
More lumbar contact is not automatically better. The correct setting should meet your natural lower-back curve without forcing the pelvis forward or creating concentrated pressure. If the lumbar support feels too prominent even at a suitable setting, compare SINC before assuming SINC 2 is the better model.
SINC 3 is designed for users who prefer a stronger sense of firmness, stability and support across the chair rather than a softer or more flexible sitting character.
It combines Smart-Glide movement with Twin Dynamic Lumbar Support in a more substantial package, making it particularly relevant to users who want greater support confidence during intensive daily use.
SINC 3 is positioned for users who prefer the chair to feel more substantial and supportive rather than light or highly flexible.
The split lumbar structure provides defined lower-back contact while contributing to SINC 3’s stronger overall support character.
Its firmer sitting feel makes it a logical comparison for users who spend long periods at the desk and prefer a chair with greater structural presence.
Your priority is specifically lower-back control rather than overall firmness, or if you prefer a more neutral and adaptable sitting feel.
Compare SINC 2 for more direct lumbar emphasis, SINC for a more balanced character, or UltraSinc for greater premium adjustment.
Choose SINC 2 when your main priority is more noticeable and controllable lower-back support. Choose SINC 3 when your priority is the overall feeling of firmness, stability and support confidence across the chair.
SINC 3 is not simply a stronger SINC 2. The two models solve different preferences: SINC 2 emphasises lumbar control, while SINC 3 emphasises the overall sitting character. Testing both side by side is the clearest way to understand the difference.
UltraSinc is the flagship of the family, designed for users who want the most complete combination of Smart-Glide movement, detailed adjustment and coordinated support across work and recline.
Its advantage is not simply having more features. The key difference is how the backrest, lumbar support, upper back and synchronized armrests work together as your sitting position changes throughout the day.
The armrests move with the chair during recline, helping the elbows remain supported instead of being left behind as the upper body moves away from the desk.
Adjustable lumbar response, upper-back support and neck positioning allow UltraSinc to be tuned more precisely across upright work and reclined positions.
Wintex Mesh across the main support surfaces combines breathability with the flagship model’s more refined material and structural presentation.
Your main priority is a specific support character rather than the widest overall adjustment package.
Compare SINC for balanced everyday versatility, SINC 2 for stronger lower-back control, SINC 3 for a firmer and more substantial feel, or SINC Air for a more relaxed sitting character.
UltraSinc’s main advantage is the way multiple support systems work together. Smart-Glide manages backrest movement, synchronized recline changes the sitting angle, the 6D Dual-Axis armrests follow recline, and the upper-back and lumbar systems can be tuned for different working and recovery positions.
Flagship does not automatically mean best fit. UltraSinc is the most complete model, but a user who prefers stronger lower-back contact may still favour SINC 2, a firmer chair may favour SINC 3, and a naturally relaxed sitter may prefer SINC Air.
A specification table can tell you what each chair adjusts. It cannot tell you which kind of support will feel most natural to you. These four questions are more useful than simply comparing feature counts.
Your preferred working angle is one of the clearest ways to narrow the range.
The important difference is not simply how much lumbar support a chair has, but how that support feels against your back.
More adjustment is useful only when those adjustments help the chair reach the right places on your body.
This is often more revealing than the feature list.
A chair may feel impressive during the first minute because the lumbar support is strong, the recline is dramatic or the armrests move in many directions.
The better question is whether you can work, move and recline without constantly readjusting yourself or trying to escape a pressure point.
The purpose of this comparison is not to identify one model as the universal winner. It is to narrow the range to the two or three SINC models whose sitting character best matches the way you actually work, move and recline.
Recommended height helps narrow the shortlist, but body proportions determine whether a chair actually fits.
Two people of the same height can have different leg lengths, torso lengths, shoulder positions and neck proportions. That is why the final decision should be based on how your body meets the chair—not height alone.
Your feet should rest securely on the floor or a suitable foot support without excessive pressure developing beneath the thighs.
The seat should support a useful portion of your thighs while still leaving comfortable clearance behind the knees.
The lumbar support should meet your natural lower-back curve rather than sitting too low near the pelvis or too high in the middle back.
Your forearms should be supported without lifting the shoulders, pushing the elbows too far outward or preventing you from moving close enough to the desk.
During recline, the headrest should reach the neck curve instead of simply pressing against the back of the head or forcing it forward.
A 170 cm user with longer thighs may need a different seat-depth setting from another 170 cm user with shorter thighs. The same applies to torso length, lumbar position and headrest reach. Treat the published height range as a starting filter—not as proof that a chair will fit.
Smart-Glide, lumbar pressure, mesh tension and overall firmness are difficult to judge from specifications alone. A side-by-side comparison makes the differences much easier to feel.
At the Niture Puchong showroom, you can compare the current SINC models under the same conditions instead of trying to remember how one chair felt after testing another somewhere else.
Start by placing your feet securely and removing unnecessary pressure beneath the thighs.
Adjust thigh support while maintaining comfortable clearance behind the knees.
Set the lumbar and backrest so support reaches the correct part of your torso.
Support the forearms without lifting the shoulders, then check neck support during recline.
Try normal desk work first, then activate Smart-Glide and compare how each chair behaves when you move.
These three models are especially useful to test one after another because their differences are primarily about support character rather than a simple increase in features.
Current SINC models available for comparison include SINC Air, SINC Lite, SINC, SINC 2, SINC 3 and UltraSinc.
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Do not switch chairs every 30 seconds. Once you have narrowed the range to two or three models, spend several minutes working, moving and reclining in each one. A pressure point or support mismatch that is invisible in the first few seconds often becomes much clearer after your body settles into the chair.
Short answers to the questions that usually matter most once you have narrowed the SINC family to two or three models.
Yes. Smart-Glide is the shared movement concept across the current SINC family. The models still feel different because their lumbar systems, backrests, armrests, firmness, materials and adjustment ranges are different.
SINC is the best starting point if you want a balanced combination of focused work, movement and supported recline without a strongly specialised sitting character.
SINC Lite is the more accessible, work-oriented entry into Smart-Glide. SINC provides a fuller all-round experience with a more balanced work-to-recline character and Wintex Mesh.
SINC is more neutral and balanced. SINC 2 places greater emphasis on lower-back control and more noticeable lumbar contact.
Choose between them based on whether you prefer a more adaptive all-round feel or a more support-focused lower-back experience.
SINC 2 is primarily about lower-back control. SINC 3 is primarily about a firmer, more substantial overall sitting character.
If lumbar intensity is the priority, start with SINC 2. If overall firmness and support confidence are the priority, compare SINC 3.
No. SINC Air has a deliberately more relaxed and lean-back-oriented sitting character. It serves a different use case rather than simply sitting below SINC in a product hierarchy.
UltraSinc combines Smart-Glide with more complete upper-body tuning, synchronized 6D Dual-Axis arm support, premium Wintex Mesh and a broader adjustment package.
Its main advantage is better coordination across work, movement and recline—not simply a longer feature list.
Start with SINC, SINC 2, SINC 3 or UltraSinc, depending on the support character you prefer.
SINC is balanced, SINC 2 is lower-back focused, SINC 3 is firmer and more substantial, and UltraSinc provides the most complete adjustment package.
Long-hour comfort still depends on correct fit, workstation setup and regular movement.
Use the published height ranges as a starting point rather than a guarantee. Among the current models, SINC 2 has the lowest published starting height at approximately 145 cm, while SINC begins at approximately 150 cm.
Shorter users should still check minimum seat height, usable seat depth, lumbar position and headrest-to-neck reach before deciding.
SINC 2 is the main starting point for users seeking stronger and more noticeable lower-back control.
SINC 3 should also be compared if what you actually want is a firmer overall chair rather than simply greater lumbar intensity.
Yes. Smart-Glide models can be kept locked in the original upright position or released for movement.
SINC 2 is the exception with an additional second locking position at the lowest Smart-Glide position.
SINC Lite, SINC Air, SINC 3 and UltraSinc include a footrest.
For SINC and SINC 2, the footrest is optional.
Whenever possible, yes. Smart-Glide movement, lumbar pressure, mesh tension, firmness and headrest reach are difficult to judge accurately from photographs and specification tables.
Testing your two or three shortlisted models side by side is usually more useful than comparing another ten specifications online.
An ergonomic chair can improve support, adjustability and comfort, but it should not be treated as medical treatment or as a guaranteed way to prevent pain.
Persistent, severe or worsening symptoms should be assessed by a qualified healthcare professional.
Still choosing between two models? At that point, another feature comparison is unlikely to help much. Compare them side by side and pay attention to which chair requires less effort to sit naturally in.
The six SINC models solve different versions of the same problem. The goal is not to move as high as possible in the range—it is to find the sitting character that feels most natural for your body and your working day.
First, narrow the range according to how you actually sit: relaxed, balanced, lumbar-focused, firmer or highly adjustable.
Then check whether the seat depth, lumbar position, armrests and headrest reach the right places on your body.
That final relationship matters more than price, model hierarchy or feature count.
Know someone comparing SINC Air, SINC Lite, SINC, SINC 2, SINC 3 or UltraSinc? Share this guide so they can compare the range by sitting character and body fit—not feature count alone.