At your desk
Turn any office chair into an ergonomic one, without buying a new chair.
Ergonomic lumbar support
Sit for hours. Feel like you didn't.
The memory foam lumbar pillow that fills the gap between your lower back and your chair, so sitting upright finally feels effortless.
Shop the pillow
from $39.95 · free shipping
- 30-day comfort guarantee
- Fits office, car & gaming chairs
- 8 colors
Slow-rebound memory foam
Molds to your curve, springs back
Shop the pillow
$39.95
Free shipping included
- Fills the gap behind your lower back
- Slow-rebound memory foam molds to you
- Fits office chairs, car seats & gaming chairs
Bundle & save
Mix colors by adding each one separately. Discount applies at checkout.
Free shipping · Arrives in 8–14 days
30-day comfort guarantee – love it or your money back
Secure, encrypted checkout
Why your back aches
Your chair has a gap. Your spine fills it with a slouch.
Your lower back naturally curves inward. Most office chairs, car seats and sofas are flat, which leaves an empty pocket right where you need support. Over a long day your pelvis tips back, your spine rounds, and the tension builds.
The Arcwell's wedge is thickest exactly where that pocket is. It fills the gap, so your back can rest in its natural shape instead of working to hold it.
- Thick where you need it12 cm at the base, tapering toward the top.
- Follows your curveA raised center contour meets your lower back.
- Molds to youMemory foam softens with body warmth, then springs back.
See the difference
Same chair. Same day. Different back.
Without support
With the pillow
Illustrative photos. Comfort varies from person to person.
How it works
Designed around the curve of your back
Contoured center
A raised center contour meets the lumbar curve, while two wide wings cradle either side of your back.
Slow-rebound foam
Memory foam softens with body warmth and molds to your shape, then gently rises back when you stand up.
Wedge profile
Thick at the base and tapered at the top, so support lands on your lower back, not between your shoulder blades.
Fits almost any seat
At 41 × 35 cm (16 × 14 in) it sits comfortably on office chairs, car seats, gaming chairs and sofas.
Wherever you sit
One pillow. Every seat you sit in.
On the road
Fill the hollow in your car seat on commutes and long drives.
In long sessions
Stay upright through late-night gaming and streaming marathons.
On the sofa
Read, scroll or work from the couch without sinking into it.
Size guide
Will it fit my chair?
Wide enough to support both sides of your lower back, compact enough for most office chairs, car seats and gaming chairs.
Weighs about 0.4 kg (under 1 lb). Measure your backrest at lower-back height. If it's roughly as wide as the pillow or wider, you're set.
See it in action
Press it. Watch it rise.
Press into it and the memory foam slowly gives way, then rises back to shape. It warms to your body, so it molds to your back instead of an average one, while the sculpted shape keeps your lower back supported all day.
The difference
Why not just use a rolled-up towel?
Feature
Arcwell
Regular pillow
Rolled towel
Contoured to your lower-back curve
Yes
No
No
Supports both sides of the spine
Yes
No
No
Memory foam that molds to you
Yes
Partly
No
Springs back to shape
Yes
Partly
No
Works in office, car & gaming chairs
Yes
Partly
Partly
Looks good on your chair
Yes
Partly
No
Try it for 30 days. Love it, or get your money back.
Sit with it through a month of workdays, commutes and late-night sessions. If it isn't the most comfortable thing on your chair, email us within 30 days of delivery for a full refund.
FAQ
Questions, answered
Can't find what you're looking for? Email us and a real person will get back to you within one business day.
Will it fit my chair?
It fits most office chairs, gaming chairs, car seats and sofas. It measures 41 × 35 × 12 cm (16.1 × 13.8 × 4.7 in). Hold a tape measure across your backrest at lower-back height to check.
Is it firm or soft?
Medium. The memory foam feels soft when you first lean in and softens a little more with body warmth, but the contoured shape keeps your lower back supported while you sit.
Will it help with back pain?
It's designed to support the natural curve of your lower back and reduce slouching, which many people find more comfortable during long periods of sitting. It's not a medical device. If you have ongoing pain, please talk to a healthcare professional.
How long does shipping take?
Shipping is free on every order. Orders typically arrive in 8–14 days, and you'll get a tracking link by email as soon as yours ships.
What if I don't like it?
You're covered by our 30-day comfort guarantee. If it isn't right for you, email us within 30 days of delivery and we'll refund you in full.
How do I clean it?
Spot clean the cover with mild soap and water and let it air dry. Don't machine wash or soak the memory foam.
Which color should I pick?
Oat and Stone blend into light, natural spaces. Graphite and Midnight suit black office chairs, gaming chairs and car interiors. Sage, Sky, Blush and Butter add a soft pop of color.