Wedges and cutouts sit next to each other in every seat-cushion search, and the names tell you almost nothing about which one your situation is asking for. They are not two versions of the same idea. A wedge changes the angle you sit at; a cutout changes where your body makes contact. Those are different jobs, and buying the wrong one is one of the surest ways to conclude that “cushions don’t work.”
What a wedge actually does
A wedge is a triangle of foam — thicker at one edge, tapering toward the other. Set with the thick edge at the back of the chair, it tilts your pelvis forward, which tends to stack the spine more upright and open the angle at the hips. People reach for wedges when the complaint is posture-shaped: slumping into a soft seat, a car seat that reclines the pelvis backward, a chair that leaves them rounding their lower back by hour two.
What a wedge does not do is remove pressure from any specific point. Your full weight still lands on the same anatomy — it just lands at a different angle. If the problem is two sore spots that light up under the bones you sit on, a wedge relocates the ache; it does not unload it.
What a cutout actually does
A cutout cushion removes material exactly where you do not want contact and keeps firm support everywhere else. The Socket Seat’s version is two contoured openings, each 3.5″ wide with centers 6″ apart, so the sit bones rest over open space while the thighs and glutes — surfaces that carry load well — take the weight. What happens when the sit bones take your full weight covers why that redistribution is the whole point.
What a cutout does not do is change your sitting angle in any meaningful way. If your issue is a slumped posture or a bucket seat rolling your pelvis backward, openings under the sit bones do not address the geometry that is causing it.
The one-question test
Would shifting in your seat fix it for a minute? Pressure pain eases the moment you lean to one side and take the weight off the sore point — that is a contact problem, and contact problems want a cutout. If no amount of shifting helps but sitting up straighter does, that is an angle problem, and angle problems want a wedge. One exception: pain at the tailbone itself also eases when you sit up straighter, for a different reason — so if the sore spot is the very bottom of the spine, read tailbone pain vs sit-bone pain before buying either.
Where each one honestly wins
The wedge wins when the seat itself tilts you wrong: rear-sloping car seats, deep sofas, chairs with no tilt adjustment. It is also the cheaper experiment, and for people whose discomfort is diffuse — the whole lower back, rather than nameable points — angle is usually the better first variable to change.
The cutout wins when you can point at the pain: two spots under the sit bones, or one spot at the tailbone. Point pressure is a contact problem, and no amount of tilting redistributes weight away from a bony prominence the way removing the surface underneath it does. Which of those two patterns you have decides which cutout geometry you want.
Full disclosure of where we stand: Aylio’s catalog is two cushions, and both are cutouts — that is the geometry we think earns its price over a long sit. We do not currently sell a plain wedge, so if the one-question test pointed you at angle rather than contact, we are genuinely not your store.
The hybrid case
The two jobs are not mutually exclusive, and some cushions borrow from both. The Socket Seat itself carries a mild wedge profile — the rear edge, the one with the tailbone groove that sits against the backrest, is the thicker one — but its job is the openings; the taper is there to seat the geometry correctly, not to correct your posture. It also raises you about 2″, which means your chair height and desk relationship need a reset either way.
If the contact problem is at the sit bones
Two openings for the sit bones, firm foam everywhere else, and a 100-day trial to find out on your own chairs. Deliberately firm — here is why. Tailbone-first instead? That is the other cutout.
Before deciding anything, spend the sixty seconds the fit checker asks for. A cutout only works when the openings line up with your anatomy — and if they will not line up with yours, we would rather tell you now than after checkout.