SIDIZ offers a 30-day free trial so customers can try out the product!

Unfortunately, we don’t have offline stores at this moment.

All SIDIZ products are made in South Korea and Vietnam.

SIDIZ is a vertically-integrated company which means that we own every part of the design, manufacturing, and distribution process.

3-year Warranty for quality-related issues

For 3 years after the date of purchase, SIDIZ takes we take care of all quality-related issues with a REPLACEMENT.

*Reminder: Be sure to use your product as directed.
**Limitations
- Upholstery and foam will be warranted for 1 year.
- Our returns and exchange service is limited to all purchases made from SIDIZ. If you purchase through a different retailer or a retailer in other countries other than the US, please contact them directly. (Unauthorized reselling of SIDIZ products is strongly prohibited.)
- Warranty-related shipping costs can only be covered in the US.
- When returning an item, please ship it back within 14 days after you receive approval. Further delay may void your return.

For any questions or issues about SIDIZ items you have purchased, please refer to our help center, or contact us.

Please request cancellation or contact us as soon as possible to cancel your order. You can only cancel items or orders that haven't entered the shipping process yet and please note that some orders cannot be canceled if they are physically picked and packed at our warehosue ready to be shipped.

Shipped orders cannot be canceled, and you may follow the return process.

You can only change or update the order that hasn't entered the shipping process.Shipped orders cannot be changed, and you may follow the return process.

Once your order is shipped, you will receive an email with tracking information from us. You can also check the delivery status in your account page.

We ship to the 48 contiguous United States excluding Hawaii and Alaska.

We will ship out your order within 2 business days from the date we receive your order.
Depending on your location, you can expect your order to delivering in 2-8 business days to reach your doorstep after it is shipped.
However, due to COVID-19, unexpected delivery issues, and national holiday congestion, delivery can be delayed depending on the situation.

While we’re working on setting up quicker options in the future, we don’t offer expedited shipping options or date-specific delivery at this moment.

If you are within the 30 day return window, please submit a return/exchange request where you purchased the item from.

For orders placed from our official website, you may create and download a return label here.

https://track.shipstation.com/f/r/o/oyPCVh0uFq53O1e2IhOCfw%3D%3D

Once we receives the returned product, we will review it and notify you by email within 2 weeks if you are eligible for a refund or exchange.

We offer a 30-Day Free Trial if the product and the packaging are in original condition.

We can only accept the return of products that are in an unassembled condition. Please keep the packaging for 30 days returns without the original packaging will be rejected. Or restocking fees may be charged according to the refund policy.

If the shipping box is damaged severely, please refuse to receive the product and send it back to us. You may claim a full refund or replacement in this case.

Please contact Sidiz customer service or customer@sidiz.com for proper support.

Yes, the return shipping is free when requested within the return window.
If you need an assistance, please contact Sidiz customer service or customer@sidiz.com.

To disassemble the gas lift and the base, please follow the two instructions below.
It is okay to damage the gas lift when you disassemble it.

#1.
Please look at the first attachment and prepare a rubber hammer.
By hitting the gas lift outwards, you can remove it from the body part of the chair.
Hit in the direction where the green arrow shows, and you will see the gas lift wobbling from the seat base.
The base could be also fallen from the gas lift while doing so.
Please hit the gas lift very hard to disassemble it.
* If you have a pipe wrench, you can use it to shake the gas lift out from the chair top part.

If you don't have the original shipping box, you can use a similar size box but, please make sure to contact us before you send the item back.

Make sure the packaging is appropriate to avoid damages during transport.

After we receive and approve the returned product, it may take up to 14 days to process the full refund depending on payment methods. If you are seeing delays, please contact your credit card company.

For a detailed guide on how to install and use the product, please visit our User Guide Page.

All SIDIZ products require assembly. The step-by-step instructions will be included for you to follow, and we also offer assembly videos and user guides on our User Guide Page.

Unfortunately, we don’t sell replacement parts separately. However, please contact us of warranty service in case if you have any quality-related issues.

T50 and T40 are both office chairs with ergonomic adjustment functions.
For more information, please visit [Compare Models] for further details.

The main difference between T50 and T50 Air is the seat material.
T50 has a fabric seat cushion with a sponge, whereas T50 Air is a full mesh chair.
The seat pan of T50 Air is made of mesh instead of a sponge.
Lastly, T50 Air doesn't have lumbar support different from T50.

Yes, you can remove the headrest easily.

For more details, please refer to the assembly guide in User Guide Page.

The backrest and the seat pan need to be lined up perfectly, and the backrest should be inserted into the end of the groove.
If you failed to insert the screws into one of the sockets, it is most likely that the backrest and the seat pan didn't line up properly.
Please check out the instructions below and try assembling once more.

1. Please disassemble all of the chair parts.
2. Find a flat surface and assemble both armrests on the chair first. You will have the seat + armrests assembled.
3. Place the seat mounted, and insert the backrest inside the seat pan.
* TIP : The armrests will help the chair stay tilted at the right angle.
4. Insert screws from following the numbered spots in the picture.
* TIP : Going diagonal helps easy assembly.
5. Before screwing the bolts, please make sure to press the joints very hard.
* TIP : In case it doesn't work, it is helpful to put up the seat side with a hand and push down the backrest while inserting the bolts.

T50's backrest is designed ergonomically, slightly tilted, following the shape of the user's back.

T50's backrest is designed to naturally follow every moment of the user. Thus, the backrest cannot be locked at particular angles.

T50's foward tilting allows you set the seat pan in two positions. If you adjust the seat slope other than these two positions, it won't stay at the angle.

The injection gate for molding may form a line in the seat. Please note that these lines do not affect your experience on SIDIZ chairs.

The tilting mechanisms are different.
The T80 chair’s patented mechanism (US8528973) is co-designed with ITO design studio Germany and engineered by SIDIZ, which makes it possible for the chair to support your back more closely when you tilt the chair.
Also, T80 is a bit bigger than T50.
For more information, please visit the SIDIZ website.

T80's backrest is designed to naturally follow every moment of the user. Thus, the backrest cannot be locked at particular angles.

Unfortunately, we are selling the swivel type only on Amazon.
Please check the model number (SKU) and refer to below.

If you are using the sit-brake casters, when a weight of more than 55 lbs is applied on the seat, the caster will stop moving for your child's safety. When not seated, it can be easily moved.

T40 and T50 are both office chairs with ergonomic adjustment functions.
For more information, please visit [Compare Models] for further details.

Yes, you can remove the headrest easily.

For more details, please refer to the assembly guide in User Guide Page.

Weight Activated Tilt (WAT) Mechanism is a function that detects the user’s weight and adjusts the tilt tension when the user leans back.

A light-weight user, for instance, will have a weaker tilting tension, whereas a heavier user will have a stronger tilting tension.

T25 with WAT will automatically adjust to the user’s physique, allowing the user to sit for extended periods of time without straining the waist.