08:30
At the desk
The long stretch starts here
Eight hours on a task chair is where a flat seat gives up. The tall back fills the curve of your lower back and the cut-out keeps weight off your tailbone.
Ergonomic Memory Foam Seat Cushion for Lower Back Comfort
$55.00
Sale price
$55.00
Regular price
$80.00
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★★★★★4.8/5 · 2,987 reviews
Ergonomic Memory Foam Seat Cushion for Lower Back Comfort
One-piece memory-foam cushion that supports your seat and your lower back.
If your chair has a towel, a pillow or a folded blanket on it, you've been patching a gap.
It isn't the chair, and it isn't you. A flat cushion only pads the seat, so the space behind your lower back stays empty. This one-piece cushion supports both: the seat under you and the curve behind you. Nothing to stack, strap on or rebuild.
- One piece: seat and lower-back support stay lined up
- Open tailbone cut-out keeps pressure off the tailbone
- High-density memory foam that springs back, sit after sit
- Non-slip silicone base and strap for office chairs, car seats and dining chairs
$55.00
Sale price
$55.00
Regular price
$80.00
Estimated delivery Oct 31 – Nov 4
Ships in 1–2 business days. Free US shipping over $45.
- Fast US shippingTracked, to your door
- 60-day guaranteeSee our policy
- Secure checkoutEncrypted payment
- Friendly supportWe answer every message
A one-piece, L-shaped memory-foam seat cushion. The flat part supports the seat, and the tall back supports your lower back, so a single piece covers both.
- One piece: seat and lower-back support together
- Open tailbone cut-out
- High-density memory foam that holds its shape
- Non-slip silicone base and strap
- Washable cover
See it in use
Short clips of the product at work. No sound needed.
Sound familiar?
Nobody shops for a seat cushion for fun. It usually starts with a small fix that keeps failing.
-
The towel, the pillow, the blanket
You roll one up, wedge it behind you, maybe hold it on with a strap or a bungee. By lunch it has slipped or squashed flat, and tomorrow you build it again.
What changes
The tall back fills the gap behind you and is part of the seat piece, so there is nothing to rebuild.
-
The cushion that went flat
It felt great in week one. By month two you were sitting on the same thing as before, plus a little disappointment.
What changes
High-density memory foam springs back after every sit, so it keeps its shape.
-
The seat that lost its shape
Office chairs and truck seats wear a dip in the middle. You sink in, and nothing supports the curve behind you.
What changes
The firm, contoured base sits on top of the dip and gives you a level seat again, with support behind your back.
Try it on the chair you dread most.
That is the honest test: the desk chair, the car seat, the kitchen chair. If it is not right for you, you have 60 days from delivery to ask for a full refund.
Built for the hours you sit.
A one-piece, L-shaped memory-foam cushion for the chair you already own. The flat part sits under you, with an open cut-out for the tailbone. The tall back fills the space behind your lower back. A non-slip silicone base and a strap keep it in place.
For long desk days, long drives and the dining table.
One piece, two jobs
Seat and lower-back support in a single piece, so the two parts cannot drift apart.
Tailbone cut-out
An open channel keeps direct pressure off the tailbone while you sit.
Dense memory foam
Soft enough to be comfortable, firm enough to keep its shape, day after day.
Stays put
A non-slip silicone base and a strap hold it on office chairs, car seats and dining chairs.
A day on one seat
Where a seat earns its keep: the desk, the road and the table.
17:45
On the road
Same seat, a different chair
The non-slip base holds the cushion on a car seat, so you sit a little more upright for the whole commute. Lift it out and take it with you.
Why it works
The short version.
Comfort that lasts the whole sit
Tailbone cut-out
An open channel keeps the tailbone area free of contact, so you sit on foam instead of on pressure.
Dense memory foam
Follows your shape and returns to form when you stand, so it does not flatten like thin padding.
Weight spread wide
A broad, contoured seat spreads your weight over more surface, so no single spot carries it all.
Support for the seat and your back
One piece
Seat pad and lower-back support in one, with nothing to strap on or realign.
Tall lumbar back
Follows the curve of your lower back and fills the gap that flat cushions leave.
A level seat
A wide, symmetrical base helps you sit level instead of leaning on one side.
Easy to live with
No setup
Place it on the seat and sit down. Nothing to assemble, inflate or charge.
Moves with you
Lifts out in a second and goes from office chair to car seat to dining chair.
60-day guarantee
Try it on your own chair. If it is not right for you, ask for a full refund within 60 days of delivery.
Anatomy of a better seat
Five details with one job: keeping you comfortable through the long stretch.
Not all seat cushions are the same
A flat pad cushions. A shaped one supports.
| Lumera seat cushion | Ordinary flat cushion | |
|---|---|---|
| One piece: seat and lower-back support | Yes | No |
| Memory foam that holds its shape | Yes | No |
| Tailbone cut-out | Yes | No |
| Non-slip base and strap | Yes | No |
How to use it
A few steps to get the most out of it.
Place it on the seat
Set the cushion on your chair with the tall back against the backrest and the non-slip base facing down.
Sit all the way back
Slide your hips back until your tailbone sits over the cut-out and your lower back meets the support.
Secure the strap
If you like, fasten the strap around the backrest so it stays exactly where you put it.
Take it with you
Move it between your office chair, car seat and the chair at home. It works on any firm, flat seat.
The details
- Width
- 44 cm / 17.3 in
- Depth
- 42 cm / 16.5 in
- Back height
- 32 cm / 12.6 in
- Filling
- Memory foam
- Design
- Tailbone cut-out with raised lumbar back
- Base
- Non-slip textured bottom
- Colour
- Charcoal top, grey base
- Works on
- Office chairs, car seats, dining chairs
How is it different from a flat cushion?
A flat cushion only pads the seat. This one is a single L-shaped piece: the flat part sits under you and the tall back fills the space behind your lower back.
Will it fit my chair?
It works on most firm, flat seats: office chairs, car seats and dining chairs. The size is listed in the specs above.
Will it slide around?
The silicone non-slip base grips the seat, and the strap goes around the backrest to hold it in place.
Can I use it in the car?
Yes. It lifts out easily, so you can move it between your car, truck and desk.
How do I clean it?
The cover is washable. Check the care label for the temperature, let it air dry and keep it away from direct heat.
What if it is not right for me?
You have 60 days from delivery to ask for a full refund. Returns are free. Details are in our Refund policy.
How long does delivery take?
Delivery takes 5-7 business days within the US. You get a tracking link by email as soon as your order ships.
Ergonomic Memory Foam Seat Cushion for Lower Back Comfort
One-piece memory-foam cushion that supports your seat and your lower back.