Sit in Extreme Comfort – All Day Long

For Hours with the Ergo21 Sports Cushion!

More Comfortable than Gel Seat Cushions or Foam Seat Cushions. Made in the US.

Ask Doctor Jo
Reviewed Our Seat Cushions!

Watch the Cushions in Actions! - A short Video

Which Cushion should I buy - A short Video

Leave behind your tired and achy backside with our Ergo21 Extreme Comfort Seat Cushion! With the power of advanced LiquiCell Technology, our seat cushion makes it possible for you to sit for hours upon hours without aches or soreness.


This is the science of comort

An aid for;

buttock pain – hip pain – groin pain – leg pain – sciatica and other issues involving sitting.

What LiquiCell Will Do for You…

LiquiCell is medical technology that protects skin tissues from being stretched and torn. Ultra-thin cells contain liquid that’s in constant motion allowing your body to glide and float. What this means to you; is instant comfort, reduction and elimination of numbness, fidgeting, and tail burn.

4 Sizes Available.

Regular Size:
Specs: 17″ x 15.5″ x 2″
Weight: 1.75 lbs
Recommended for those who weigh up to 175lbs and are up to 5’9″

Large Size
Specs: 18″ x 17″ x 2″
Weight: 2 lbs
Recommended for those who weigh 175 lbs.+

Large Deluxe Size
Specs:18″ x 17″ x 2.5″
Weight: 2.4 lbs.
Recommended for those who weigh 200 lbs. +

Extra Large Size
Specs: 20″ x 18″ x 2.5″
Weight: 2 lbs. 11 oz
Recommended for those who weigh 250 lbs.
(For Cars, Trucks & Suv’s we recommend the Large or Extra Large)

Ergo21 Sports Cushion Box

Sport Edition
Extreme Comfort Seat
Great for every seat, such as:

Sports • Wheelchair • Church • Recreation • Concerts • Can also be used in your car or office if extra cushioning is needed

Anatomy of a Perfect Seat Cushion

A seat cushion should not restrict your movements or cut off circulation. By carefully combining the proper density of polyurethene foam and a layer of LiquiCell Membranes to maintain blood flow under the tail bone, hot spots and vertical pressure on the sitting bones is virtually none. In addition we use the highest quality fabric that’s durable, long lasting and cooling. Watch our video about LiquiCell Technology below.

Our Ergo21 Extreme Comfort Seat Cushion surely has the WOW factor and will put a smile on your face! Our Ergo21 Comfort Seat Cushion with LiquiCell is more comfortable than any Sports Gel Seat Cushion or Foam Seat Cushion on the market.

  • Reduce fatigue, numbness, and tail burn
  • 4 patent pending LiquiCell membranes
  • Designed to relieve discomfort
  • 2 inch high density polyurethene foam



– Mark Rodgers

What Customers Are Saying about the Ergo 21 Sports Seat Cushion with LiquiCell…


tstimg-cushionsport-1“I am a sports fan and the seats at the stadium are hard and uncomfortable. With this seat cushion it’s a pleasure to enjoy my favorite games without butt-ache.” – M. Morris

“I can now sit longer and more comfortable on my wheelchair without any soreness. It has a nice carry handle and I also often use it on my bench in the backyard.” – Nirmal .K


  • Over 150% improvement in circulation
  • Reduces soreness in tailbone & back
  • Sit in comfort everywere you go
liquicell explanation
Ask Doctor Jo
Reviewed Our Seat Cushions!

“I really like the lumbar cushion in the car. I feel like it helps prevent me from rolling my shoulders forward because I have something to push my shoulders into. I have always thought car seats are not designed very well, and kind of encourage you to have bad posture. I feel like the lumbar cushion helps get me in that neutral position.”

– Doctor Jo

Ergo 21 Sports Seat Cushion with LiquiCell vs Gel Seat Cushions, Foam Seat Cushions & Air
liquicell vs gel vs foam vs air

Clearly The World’s Best


(Gel, Foam & Air are all inferior in side-by-side comparisions.)


Long Term Blood Perfusion When Sitting on Three Different Cushioning Materials”

Goossens, Delft University of Technology, March 2006

Delft University conducted a study to determine the affect of various cushioning materials on blood perfusion (flow) over time. The aim of the study was to compare blood perfusion in the tissue in a live setting as opposed to a laboratory to get a more accurate reflection of real life conditions. The results of the study show that from the initial point of contact to some time later, LiquiCell actually improves blood perfusion by 150%, whereas gel and foam show a decrease in blood perfusion.

liquicell blood perfusion chart
special offers


When You Order 2
or More Any Cushions


Ergo21 Sports Cushion

Seat Cushion

Better than a gel car cushion or foam car cushion

Bicycle Seat Cushion

Coccyx Cushion

better than gel Coccyx Cushion or foam Coccyx Cushion

Mattress Overlay

Lumbar Cushion

Lumbar Cushion

Travel Cushion

Travel Seat Cushion


*****Brought this for Mom, she recently injured her…

Brought this for my mom, she recently injured her back and she can’t sit down too long or her back really starts to hurt. So, I decided to look on amazon for seat cushions and I found this one. I read the review’s and found them very convincing. So, I brought this one and Ergo21 LiquiCell Original Seat Cushion… for her to use at work and on trips. She loves them both and now she is less tired after work and long trips.

By Mahb HopeVerified Purchase

*****Best one ever, I’ve tried many! – Available in four sizes!

I pride myself on being an honest businessman and my clients know it so here’s the straight scoop. I have used multiple cushions over the years to help prevent low back pain, along with a lumbar support. I work long hours in my home office and this one, the thickest size, is the absolute best. It’s 2.5 inch thick. This thickest lifts me up and prevents pain. I hope they continue making it! I’m also getting one for the couch it’s so great for the back.

By SC RobertsVerified Amazon

*****We have finally arrived at the best cushion for my husband’s wheelchair

After 3 years of switching cushions to find a “better fit”; we have finally arrived at the best cushion for my husband’s wheelchair. The Sports cushions were exchanged until we had the correct fit and non-slip cover. Also, the lumbar cushion is great for longer car rides..and I bought another for myself. This company was wonderful with their personalized customer service and follow-up. I would highly recommend these products.

By Amazon CustomerVerified

*****Very Good Cushion for Sciatica sufferer

I had an accident and fractured my hip. After surgery with total hip replacement, 8 weeks of FT and cortisone shots, I continued with pain on my sciatic nerve. Note that it is not cause by back problems but more like by muscles pinging on the nerve and or scar tissue. Sitting on soft or bucket like seats has always been a pain. After testing two different times of seats I settled on Ergo21 LiquiCell Cushion and bought first the regular and after a few days the sports version. I keep the regular on my BMW which was a pain driving and the other one at home. I would recommend.

By NelsonVerified Amazon

I love this seat cushion. I have been trying out different seat cushions to alleviate the pain in my back and legs. I’ve tried a memory foam cushion, and another highly rated ergonomic cushion – both were able to reduce the pain only slightly. This is the third type of cushion I tried. Within a day or two I was no longer in pain while driving or sitting.I ordered another one soon after. Great!

– Jamie

Thanks for the feedback! We looked at 19 different foams, then narrowed it down to seven. We chose this high resilience foam, that doesn’t bottom out and at the the same time offers support. The layer of LiquiCell prevents hot spots which prevents shifting, thereby keeping the spine and neck aligned to give you long term pain free comfort. Feel free to all on us anytime we can be of assistance.

Best Regards,

Steve Gambhir -Product Specialist