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Core-Tex Sit


Relieve Back Pain & Strengthen Your Core While Sitting

  • Provides relief and prevents stress from accumulating on the lower back.
  • Strengthens abdominal muscles and lower back while sitting. 
  • Great for posture and improved focus while working.
  • Relieves pain from scoliosis and helps correct postural imbalances.
  • NEW! Solid base works on softer surfaces
  • NEW! Firm upper for a more supportive seat
  • Easy to use: Simply place Core-Tex Sit on your favorite chair and sit on it. No assembly or maintenance required.

Don't Let Sitting Ruin Your Back

Core-Tex Sit saves your lower back by creating a variable sitting environment. It takes stress off your lower back while strengthening your core. The patented motion allows for a controlled, dynamic sitting experience that provides benefits to the lower back, hips, core and pelvic floor.

Dr. Elizabeth Leeds, Pelvic Floor and Orthopedic Specialist, explains the benefits of Core-Tex Sit.

Patented Reactive Variability

Core-tex product dimensions with a weight of 3.5 LBS, 14 inch diameter, and 3 inch height

Simple To Use. Works Anywhere.

Much more than just "anti-slouching" or core work, Core-Tex Sit creates a variable sitting environment that dissipates stress on muscles and joints with subtle changes in position. 

● Ultra Portable & Durable
● No Assembly Required
Video Instruction & Exercise Library

Customer Reviews

Based on 16 reviews
Sergio Gonzalez
Great product!

The Core-Tex sit is the perfect tool to use with patients that have problems with weak core muscles and impaired ability to maintaining sitting balance. Great tool and I’ll be looking to purchase the bigger version soon!

Heidi Barajas

This feedback is based on my 87 year old Mother’s review since she has monopolized my Core-Tex Sit since it arrived. She keeps the booklet right near her chair and practices the exercises every time she sits at her computer. She loves the Core-Tex Sit and believes in this short time of using it, her low back feels stronger and experiences fewer occasions of any aches. The second Core-Tex Sit was loaned to our friend/chiropractor who believes the concept of design is ingenious. He asked to borrow the Core-Tex Sit to use with some of his select patients. To date, the Core-Tex Sit is living up to its purpose.

Manuel Lopez


Andrew Hernandez
It is insanely uncomfortable

I bought this at a conference with high hopes and upon sitting on it for longer than 5 minutes, It was putting pressure entirely on one point in the middle. The material used on it is not forgiving and it was actually making me numb after a short time on it like I was sitting on a skinny bicycle seat. I think the concept is great, but it's really uncomfortable and I have barely used it because of that.

Hi Andrew,

Thank you for taking the time to share your thoughts on Core-Tex Sit. We are obviously disappointed to see that Core-Tex Sit has not met your expectations. If I may just clarify, Core-Tex Sit is not meant as a long-term replacement for your sitting surface. It is a tool to introduce a variable environment intermittently throughout the day and/or an environment to perform purposeful exercises on for a finite amount of time. The firmness of the surface is there to help the user center the “sit” bones on the surface. I personally use my Core-Tex Sit for about 30 minutes intervals while working and then return to my normal work chair.

If you have not seen this short “getting started” video, you may find it helpful.

Please feel free to reach out to me personally if I can be of any further assistance with improving your experience.


Anthony Carey M.A., CSCS, MES

Corey Lichtman, D.C.
Perfect for Lumbopelvic mobility!

Core-Tex Sit provides my patients with the perfect amount of lumbopelvic
mobility that they have not been able to get with just an exercise ball.
It's easily moveable, lightweight and takes up very little space when not in
use. The unique motion creates a great environment for strength, mobility,
and stability that I am trying to achieve with lumbopelvic exercises while
in the clinic or for the patient at home.

Corey Lichtman, D.C.
Solana Beach Family & Sports Chiropractic