New! Core-Tex Virtual Coaching

Learn More


Core-Tex Sit


Give Your Back the Motion it Needs & 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 tension and pressure 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 22 reviews
Bridget Donahue
I’m now free from intense lower back pain

I ordered the Core-Tex Sit which arrived on a Saturday. I used it twice that first day and immediately experienced significant pain relief. I was amazed. I have Ehlers Danlos Syndrome, which is a serious and highly painful genetic connective tissue disorder. And I’m sixty!

So imagine my surprise the next day when I had no lower back pain whatsoever. The same held true on Monday, Tuesday and every day thereafter. I’m now using it daily to prevent a return of that occasionally severe lower back pain which even made sitting on my couch unbearable. It’s also clearly strengthening my back, hips and abs which furthers its protective benefit and usefulness going forward. Plus, it’s enjoyable to use because it makes sitting an easy workout. I like to fidget, and this is perfect for it.

I can attest this is an excellent product for people who sit too much, even if they’re otherwise active, or those who want to prevent and/or treat the lower back problems that typically accompany aging.


Really good. Helps to align my spine


I really like this Core-Tex Sit. I wake up with back pain and tightness every morning and sitting on this and doing some movements helps me feel much better and loosens me up.

Tamra Christiansen
Great for Hip Mobility

This is great for my clients' hip mobility! These are so portable and convenient.


I absolutely love it! My back has never felt better.