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For clinicians & ergonomists
The facts, without the sales page.
If you see people who hurt when they sit — in a PT or OT practice, a chiropractic clinic, or an ergonomics program — this page collects what you would want to know before mentioning the Socket Seat to one of them: the geometry, the designed fit range, the materials record, and a measuring handout you can print for patients.
What it is — and what it is not
The Socket Seat is an ergonomic seat cushion, not a medical device, and we make no treatment claims for it. The mechanism is mechanical and simple to state: two openings in a firm foam core are positioned so the ischial tuberosities rest in open space instead of pressing on the chair, and a groove at the rear keeps the coccyx clear of the seating surface. Where a plush cushion softens contact, this one removes it at those points and carries the load on the surrounding structure.
The core is firm, high-density memory foam — deliberately firm, because the openings only work if the foam around them does not collapse under body weight. Patients coming from plush cushions should expect an adjustment period of a few days. The firm-versus-soft argument is written up here, in plain language you can point people at.
The geometry, in numbers
Every figure below matches the rest of the site. The opening width and spacing are the same numbers the fit checker uses, so the two cannot disagree.
| Opening width | 3.5″ each |
|---|---|
| Opening spacing | 6″ center to center |
| Designed fit range | Sit-bone width 3.6″ to 6.7″, center to center |
| Borderline band | 3.3″ to 3.6″ and 6.7″ to 7.0″ |
| Recommended weight range | 110–295 lbs |
| Cushion weight | 2.5 lbs |
| Dimensions | 18.5″ W × 14.5″ D × 2.5″ H |
| Core | Firm high-density memory foam |
| Top | 3D spacer mesh (airflow) |
| Base | Vegan leather, non-slip |
| Cover | Zippered, removable, machine washable |
| Materials testing | SGS lab, 2019 — lead, cadmium & six phthalates: none detected |
One point of precision, because it matters for how you frame it to a patient: the fit range is a designed-performance window, not a bone-contact boundary. Inside 3.6″–6.7″ the geometry works as intended; outside it, it will not — that is the claim, and it is the whole claim. The interactive version of this table is the fit checker.
Who it will not suit
The site tells buyers this before the buy button, and you should have the same list:
- Sit-bone width under 3.3″ or over 7.0″. Outside the designed range the geometry will not work as intended, and no cutout cushion helps when the geometry is wrong for the body.
- Outside 110–295 lbs. Below the range the sitter perches on the surface without settling into the contours; above it the foam compresses past its working depth and the openings’ walls start to close.
- Tailbone-first pain. The rear groove keeps the coccyx clear, but a patient whose complaint is squarely coccygeal is better served by a dedicated coccyx cushion — the two problems need opposite shapes.
- Very soft or uneven seating. The firm base builds its own platform on a couch, but on a bed or badly sagging seat, results vary.
- Low-roof cars. It adds about 2″ of height. Many drivers like the sightline; a patient in a low car should check headroom first.
Design provenance and materials record
What we do not have, and will not imply: clinical outcome data. The claims on this site are mechanical and dimensional, and they stay that way.
Aylio is an independent US small business, founded in 2008; more than 750,000 people have bought an Aylio product. The cushions began in 2013, designed with Larisa, an occupational therapist who has helped shape every cushion since, and the geometry is protected by US Patent 9,723,928, among Aylio’s ten issued patents. The longer version is on the about page.
On materials: an independent SGS lab tested the cushion’s mesh, leather and foam for lead, cadmium and six phthalates — none detected. The report (CANEC1827148501, 2019) is available on request; email max@aylio.com and a real person will send it.
A handout you can print for patients
Measuring your sit-bone width at home
Your sit bones (ischial tuberosities) are the two bones you feel under you on a hard bench. The distance between them decides which seating and cushions fit you. You need a piece of corrugated cardboard, a ruler, and about a minute.
- Put the cardboard on a hard, flat bench or chair — not a padded one.
- Sit on it for about 30 seconds.
- Lean forward a little and lift your feet, so more of your weight goes through your sit bones.
- Stand up. You should see two shallow dents.
- Measure between the centers of the two dents, in inches.
If balancing with your feet up feels unsteady, keep your hands on the seat and skip the lift — the dents will just be fainter. No dents at all? Sit a little longer, or use a softer single-layer piece of cardboard.
Most adults land between 4″ and 6″. There is no good or bad number — it is just anatomy. Write yours down and bring it to your appointment; it is also the number to check against any cushion or saddle you are considering.
Patient education you can hand out
There is also a ready-made one-page sit-bone measuring card (PDF, letter size) with the cardboard method, the typical adult range and the sources — free to print and hand out.
And a 1:1 fit template (PDF, one landscape page): the two openings at actual size, with a printed ruler so you can confirm the page was not scaled. A patient lays their cardboard impression on it and sees the answer without buying anything.
Every article on this site prints cleanly — navigation, buttons and the footer columns drop out on paper. The ones clinicians will find most useful as handouts:
- Measuring sit-bone width at home — the long version of the method above.
- Tailbone pain vs sit-bone pain — helping a patient localize the complaint, and why the two need opposite cushion shapes.
- Sitting with ischial bursitis — practical seated-pressure education.
- Hamstring tendonitis seat cushion: what it can and cannot change — the seated-pressure mechanics of an attachment-point condition.
- Piriformis cushion: can a cutout reach the pain? — honest triage that mostly answers no; useful for redirecting a wrong purchase.
- Why firm beats soft — the counterintuitive one, and the conversation most patients need before they buy any firm cushion.
Each article carries its own education-not-medical-advice notice and tells readers to see a clinician for persistent pain — we assume the person handing it out is you.
Ordering for a clinic, a team or a stipend
Everything ships from the same Amazon listing, so there is no wholesale form to wait on.
- Clinics and companies can order through Amazon Business (opens in a new tab) — a free account buying from the same listing, with itemized invoices.
- Ergonomics and wellness stipends usually reimburse against the Amazon invoice. The facts an approval memo needs — dimensions, weight range, the materials record and the trial terms — are all on this page.
- Five or more, or a purchase order: email max@aylio.com with the quantity and the ship-to address, and the founder replies.
- One patient at a time: hand them the printed handout; the 100-day trial covers the ones it turns out not to suit.
If it turns out wrong for a patient, they get their money back
The hard part of recommending any $99.99 cushion is that bodies vary. Two things are built for exactly that: the 60-second measurement, which flags a sit-bone width outside the designed range before a patient buys, and the 100-day trial with free returns — a patient who tries it on your suggestion and finds it does not suit them is refunded, full stop. After the trial, one replacement is available for $20 for the lifetime of the product. The full terms are here, written in plain language.
The cushion is sold on Amazon (opens in a new tab). If you are evaluating it for a clinic or an ergonomics program, or want the SGS report or answers for a specific situation, email max@aylio.com — it reaches Max, the founder, not a queue.