







Product description
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. ProtoArc SC Butterfly Seat Cushion Merchant Video
Recommended Body Weight: For optimal comfort, we recommend ProtoArc SC Butterfly seat cushion for individuals weighing less than 200 pounds. For weights exceeding 200 lbs we recommend the upgraded version SC Butterfly XL Seat Cushion.
Trusted by The Guardian – Engineered for Real Relief 
We’re proud to share that the SC Butterfly Seat Cushion has been recognized and recommended by The Guardian, a globally respected media authority known for rigorous product testing and honest health advice. You’re choosing a product backed by independent experts
Unveiling a Seat Cushion Designed with Meticulous Care
The Perfect Companion for All Your Seating Needs
Whether you’re working tirelessly at your office desk, embarking on a long road trip, relaxing at home, or enjoying the great outdoors, ProtoArc SC Butterfly seat cushion offers exceptional comfort and support wherever you go
ProtoArc Seat Cushion & Lumbar Support
Dimensions
18.3 x 15.7 x 4.3 inches, Standard size
Dimensions
20 x 16.9 x 4.3 inches, Extra Large size
Dimensions
18.1 x 17.7 x 5.5 inches, Standard size
Recommended Use
Office workers, students, home workers who sit for extended periods of time
Recommended Use
Truck drivers, overweight office workers, wheelchair users
Recommended Use
Office workers, students, home workers who sit for extended periods of time
Recommended Chair Type
Ideal for most office chairs, home chairs, and car seats
Recommended Chair Type
Perfect for truck/bus driver’s seat, large office chair, extra-wide wheelchair
Recommended Chair Type
Ideal for most office chairs, home chairs, and car seats
Best for
Users who need a standard, comfortable cushion for everyday use
Best for
Users who prefer a larger seating area and extra cushioning
Best for
Users who need a standard, comfortable lumbar support for everyday use
Target Audience
Individuals with average body size (less than 200 pounds)
Target Audience
Individuals (exceeding 200 lbs) who prefer a larger seating surface
Target Audience
Individuals with average body size
Certified Sustainability, Trusted Excellence 
Trusted by The Guardian: As featured and recommended by The Guardian – a trusted voice in health and wellness. The SC Butterfly isn’t just another foam cushion. It’s scientifically designed to relieve tailbone pain, improve sitting posture, and reduce pressure on your lower back
Innovative U-Shape Design: Unique tailbone cut-out for pressure relief, even weight distribution, and raised sides for hip support. Pre-shaped foam molds to your body for exceptional comfort and support. Upgrade to optimal comfort with our pressure relief cushion (18″L x 16″W x 4″H) and transform your sitting experience today. Note: For optimal comfort, we recommend this seat cushion for individuals weighing less than 200 pounds. For weights exceeding 200 lbs we recommend the upgraded version SC Butterfly XL
Pressure Relief Seat Cushion: Split design targets pressure points on hips, thighs, coccyx for relief from lower back, hip discomfort, promoting proper posture. Ideal for long hours seated, offers relief from back and hip
Thick Cushion Pad: 4.3″ thick memory foam remains firm and supportive without going flat. The extra-dense bamboo charcoal-infused memory foam for freshness. Provides all-day sitting comfort
Ease Of Use: Built-in handle to make it easy to carry. Breathable cover with zipper closure for easy machine washing. Non-slip bottom ensures grip, especially on leather seats, for secure placement. Removable cover maintains freshness, while the non-slip feature enhances stability
Take Comfort Anywhere: ProtoArc seat cushion relieves lower back and hip discomfort, perfect for road trips, exercise, gaming. Standard size fits all body shapes, suitable for car seats, office chairs, wheelchairs, ensuring superior support and comfort anytime, anywhere
Tips: 1. It may take 1-2 weeks to adjust to the cushion’s shape for the first time. Many find relief from back and hip pressure while improving posture. 2.The cushion comes vacuum sealed so you will need to let it expand for an hour or two before first use
11 reviews for ProtoArc Seat Cushion, Office Chair Cushion for Sciatica, Coccyx Cushion, Ergonomic Memory Foam Seat Cushion for Car, Home, Pressure Relief Pad for Hip, Tailbone, All Day Comfort – Black
Add a review
$29.99
teresa –
Comfortable
Very soft and comfortable
Rindy moor –
Highly recommend
I recommend this cushion because when you don’t have any meat on your tailbone, you really need something to protect your tailbone and this really does one little thing you need to make sure you’ve got it adjusted right in the seat that you’re sitting in other than that, I highly recommend recommended
Rob W –
Good cushion with some benefits — just not quite what I hoped for
I had mixed but mostly positive feelings about this ProtoArc seat cushion. First off, I was honestly shocked by how small the box was when it arrived. I couldn’t believe the cushion fit inside it. After opening it up and letting it expand, it did take shape, but that initial impression set my expectations a bit cautiously.What I like:Comfortable overall: It definitely adds comfort compared to sitting directly on a standard office chair. It does relieve some pressure, especially during shorter sitting periods.Nice design: The U-shaped cutout and contouring are well thought out and seem intended to help with tailbone pressure.Quality materials: The cover feels nice, breathable, and well-made, and the cushion itself doesn’t feel cheap.Non-slip bottom: It stays in place on the chair and doesn’t slide around, which I appreciate.Portable: The built-in handle is convenient if you plan to move it between chairs or locations.Where it fell a little short for me:Smaller than expected: For my chair, it felt a bit undersized. It works, but I was hoping for something that covered more of the seat area.Compresses more than I’d like: Over time, it tends to squish fairly flat, especially if you sit for longer stretches. I was hoping for firmer support and more structure.Support level: It helps, but I expected a little more lift and long-term support based on the description.Bottom line:This is a good cushion, and I do like it — I just don’t love it. It provides comfort and some pressure relief, but it didn’t fully meet my expectations in terms of size and firmness. If you want moderate comfort and portability, this is a solid option. If you’re looking for maximum support or a larger, firmer cushion, you may want to consider sizing up or exploring other models.Overall, it’s a decent product and worth 4 stars — just not quite the perfect fit for my needs.
Pyratio –
great for heavy people.
pretty darn good cushion if you’re a remote worker. Does not pancake under my 235 pounds and is very supportive. Have tested for nearly a month working 8+ hours a day and it is very comfortable. little tip, this will raise the height of your chair, so lower it slightly and you will be very comfortable. I had a great memory foam brand name chair but after 3 years that memory foam isn’t as supportive as it used to be. this cushion will give you some back relief until another sale comes around for new chairs. Also it does position your a little forward, which I like a lot as that is how I sit most days.
Tracie H –
Great cushion!
Let me start by saying that I paid full price for this item and was not given it in exchange for a 5 star review. This cushion earned the 5 stars all on its own! Honestly I was expecting much since I paid less than $20 but I have multiple medical issues that necessitate using some type of coccyx cushion when sitting on anything (chairs, wheelchairs, even fabric covered benches and ottomans) and I already own about 8 different kinds of cushions. I’ve tried (and still use the good ones) and many are pretty much identical to each other even though they boast different features and the listings look different. All of them are more expensive than this one (some significantly more expensive!). Recently I had to start weekly IV infusions and while they try to make the chemotherapy chairs as comfortable as possible any pressure on my tailbone and lower back is excruciating. Both sides of my pelvis are also fractured so I can’t lay one my side. This cushion is just the right height and density to take the pressure of of my coccyx (and lumbar/sacral area) while also having enough padding on each side for hips.It is wider than most of the cushions I own so if you have a particular chair or wheelchair in mine make sure you measure first. It also might not be ideal for very petite people. I’m about 5’7” 160 lbs but my great aunt who is 4’11” and 90 lbs soaking wet would be way too small to comfortably sit on this cushion. I can’t speak to whether it improves your posture why sitting because I have so many medical conditions that cause spinsl curvature that a cushion can provide support but definitely not alter my posture.I also can’t speak to the longevity of the product but it is very well made. The stitching is impeccable, the fabric is high quality, the material is sift, the zipper slides easily, and the handle is firmly attached. It’s honestly better quality than the $60-$80 cushions I’ve bought. It came nicely packaged with information about the company, the company’s founder, and customer service information in case you have any questions or issues. It has a 2 year warranty. I love that it has a removable cover that can be washed and even the inner foam material is covered in a waterproof material so you don’t have to worry about spills or accidents seeping in to the foam.
Davis –
The best cushion
Works great for secret lab titan chair. I am very happy with this purchase. Helps me stay comfortable .
Timmy-87 –
Iv tried 3 other cushions from AmazonThis is by far the best and finally found want I was looking for the XL version is exactly right its the version id get the large ones others sell are more for kids or very small adults
tlc –
Great product – I use in office, reclining chair and car seat when driving. Perfect for cushioning tailbone (coccyx)
Jerzy Kozlowski –
It’s a really good product !Contoured to accommodate your posterior at all points, except coxccys to provide relief from pain.It’s comfortable to sit on, having that right blend of softness, yet firm.I bought it for my upcoming hemorrhoid operation, which I haven’t received my appointment yet.
茶々 –
すごく座り心地良く最高です。
Akira 23 –
Comprado para una adolescente después de una caída de bicicleta y el coxis roto. De estar funcionando muy bien. Es muy cómodo y le quita todos los dolores. La única dificultad es sentarse en el cole por la altura que tiene el tamaño de las mesas de colegio, pero en el cole usa una almohadilla de avión de cuello, medio hinchada