• Kopflo Arch lumbar pillow beside a standard pillow showing its compact low profile
  • Woman lying on her back with the Kopflo Arch filling the gap under her lower back
  • Man working at a desk with the Kopflo Arch supporting his lower back
  • Close view of the Kopflo Arch's knit texture and saddle contour
1 4
★★★★★ 4.7 164 reviews

Kopflo Arch™ Lumbar Sleep Pillow

Kopflo Arch™ Lumbar Sleep Pillow

Contoured Memory Foam Support for the Lower Back — Bed & Desk

$49.90
$64.90 $49.90
Sale Sold out
Fills Lumbar GapMemory Foam CoreBack & Side SleepOffice & Bed
30-night risk-free guaranteeSleep on it for 30 nights. If it isn't right, we'll make it right.

Your lower back arches. Your mattress doesn't.

Lying flat leaves a gap under the lumbar spine — muscles hold the arch all night, and mornings start stiff. The Arch™ fills that gap: a contoured memory foam pillow with a saddle-dip profile that supports the natural curve lying on your back, fills the waist gap on your side, and moves to your office chair by day.

  • Fills the lumbar gap, so the muscles stop bracing and the lower back actually rests — flat on your back or on your side
  • Memory foam that adapts, a 90% memory foam core that shapes to your curve and returns every night
  • Works day and night, 40 × 30 cm — under your waist in bed, behind your back at the desk

Overview

What it is: a contoured memory foam lumbar pillow with a saddle-dip profile — raised side lobes, gentle center dip. Size: 40 × 30 × 10 cm (15.75" × 11.8" × 3.9"), in a warm coffee-brown knit.

On your back: slides under the waist to fill the gap between lumbar spine and mattress, letting the muscles that brace that arch finally release.

On your side: fills the waist gap so the spine stays level instead of sagging toward the mattress.

At the desk: the same contour works against an office chair's backrest for lumbar support through the workday.

Who it's for: back and side sleepers who wake with lower-back stiffness, and desk workers whose chairs offer no lumbar curve.

Care

Cleaning: spot clean with a damp cloth and mild soap; the knit cover is sewn to the contour and doesn't remove. Air dry fully before use.

On arrival: allow 24–48 hours to air out and fully expand, as with any new memory foam.

Storage: keep dry and uncompressed — don't store heavy items on top.

Materials

Core: 90% memory foam blend that compresses under the waist's weight and slowly recovers — soft enough to sleep on, resilient enough to keep filling the gap night after night.

Contour: the saddle profile is the mechanism — raised lobes support either side of the spine while the center dip cradles the back itself, avoiding pressure on the vertebrae.

Cover: soft stretch-knit exterior in coffee brown, sewn to the contour so it never wrinkles or shifts underneath you.

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Side view of the Kopflo Arch filling the lumbar gap under a back sleeper's waist

The Gap Your Mattress Leaves Behind.

Flat mattresses don't follow the spine's curve — the lumbar arch hangs unsupported, and the muscles around it work all night to hold it. The Arch™ slides under the waist and fills that space, so the arch rests on foam instead of effort.

The Kopflo Arch tucked against the waist gap of a side sleeper

One contour, three jobs

Back, Side, or Chair.

Under the waist for back sleeping, against the waist gap for side sleeping, or behind the lower back at your desk. The saddle dip keeps pressure off the spine itself while the lobes carry the load — the same mechanics in every position.

The Kopflo Arch on a wooden bench beside folded linens and a ceramic bowl

Memory foam, knit finish

Soft Where It Touches. Firm Where It Counts.

The memory foam core shapes itself to your curve and recovers by morning; the coffee-brown stretch knit stays smooth beneath you. At 40 × 30 cm it supports without crowding the bed — and tucks under an arm on the way to the office.

4.7 / 5 ★★★★★

Trusted by people who take rest seriously

From recovery nights to everyday sleep, our customers choose structure that holds up.

★★★★★

Morning back stiffness is gone

I'd wake up every morning with a tight lower back and blamed my mattress. Turns out it was the gap under my spine. Slid this under my waist and within a week the morning stiffness was basically gone.

Greg H.

Verified buyer

★★★★★

Use it at my desk too

Bought it for sleeping but it lives on my office chair during the day now. The contour fits my lower back perfectly and I'm not slouching by 3pm anymore. Basically two products in one.

Nadia K.

Verified buyer

★★★★★

Right amount of firm

I was worried it would be a hard lump under my back but it molds to the curve and softens once you're on it. Holds its shape by morning too. Took me about three nights to get used to, now I can't sleep without it.

Brian W.

Verified buyer

We're here to help

Frequently asked questions

How does it help lower-back pain?
When the lumbar curve hangs unsupported, the surrounding muscles brace all night — that's the morning stiffness. Filling the gap lets those muscles release. It addresses positional strain; if you have a diagnosed spine condition, check with your doctor or physio first.
Do I sleep on it all night?
You can — it's sized and shaped for all-night use under the waist. Some people start with 20–30 minutes before sleep while the body adjusts to the support, then extend to full nights within a week.
Does it work for side sleepers?
Yes — on your side, the waist dips toward the mattress and the spine bends with it. The Arch™ fills that waist gap so the spine stays closer to level. Pair it with a knee pillow like the Kopflo Luna™ for full side-sleeping alignment.
Can I use it on my office chair?
Yes — placed against the backrest at belt height, the same contour supports the lumbar curve while sitting. Many people keep it at the desk by day and move it to bed at night.
How firm is it?
Soft-to-medium: the memory foam compresses under body weight and molds to your curve rather than pushing back hard. It's support through fit, not firmness — which is what you want directly under the spine.

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