HydroLoop Complete Sleep & Comfort System — by Hushfold
No subscription, ever. • 100-night sleep trial • Free shipping & returns
The HydroLoop water-cooled cover on the bed, with the bedside dock
60°–104°F range ≤28 dB whisper-quiet
The HydroLoop water-cooled cover on the bed, with the bedside dock
The HydroLoop dual-zone system with one side at 64°F cool and the other at 75°F warm
Close-up of the HydroLoop by Hushfold cover and its branded tag
The HydroLoop Dock control panel for setting each side to cool or warm
The quiet HydroLoop dock on the nightstand
Water-cooled bed climate system

HydroLoop™

New for 2026 · Limited pre-orders

Cools your bed to 60°F. Warms it to 104°F. Dual-zone comfort, controlled right on the Dock. No subscription, ever.

$1,295 One-time · No subscription
or $108/mo with Affirm · HSA/FSA eligible

What size is your bed?

The HydroLoop cover fits on top of your existing mattress. No need to replace anything.

Due to high demand, orders ship in numbered batches. Reserve now to hold your spot in Batch 2.

Batch 1 Sold out
Batch 2: Pre-order 82% claimed

Batch 2 orders estimated to start shipping in 6–8 weeks.

Add to cart
  • 2-year warranty
  • 100-night sleep trial
  • Free shipping

Proof of cold

The room isn't the problem. Your mattress is.

Air conditioning cools the air. It never reaches the heat trapped under your body. HydroLoop circulates water through the cover itself and physically pulls that heat away, all night.

60–104°F
your temperature range
±0.5°F
holds your temp
≤28dB
quieter than a whisper
2zones
independent sides (Queen/King)

Why water

Water cools. Air just blows.

Fans and AC move air around the room. Water pulls heat out of the bed you’re actually lying on.

~25×
Water conducts heat about 25× more effectively than air*
Water-cooled bed with glowing dual-zone channels beside a sleeper trapping heat under a duvet

Water cooling

HydroLoop
  • Pulls heat out of the bed by direct contact. Conduction, not airflow
  • Cools the surface under you, where body heat actually gets trapped
  • Holds your exact temperature to ±0.5°F, all night
  • Silent circulation at ≤28 dB
  • Dual-zone: each side of the bed runs its own temperature

Air cooling

Fans, AC & “cooling” toppers
  • Blows air over you. That is surface evaporation, not heat extraction
  • Cools the room while heat stays trapped between you and the mattress
  • No held temperature, so you wake up hot at 3am or freezing at 5am
  • Fan and compressor noise all night
  • One temperature for the whole room, for both sleepers

*Thermal conductivity of water vs. air at room temperature.

Honest comparison

The premium cover, without the price or the strings

Same full-cover form factor as the premium systems. Roughly half the price. And nothing you have to keep paying for.

 
HydroLoop
The Competitors
Full-cover fit (not a side pad)
✓
✓
No subscription, ever
✓
Required
No app to babysit, just simple on-Dock controls
✓
App
Dual-zone (Queen & King)
✓
✓
Temperature range, per side
60°–104°F
Similar range
Sleep trial
100 nights
Typically 30
Warranty included
2 years
Typically 1 year
Starting price
$995
$2,649

Everything it does

The complete bed climate system.

No app to babysit, no membership to maintain. Every feature works out of the box, and keeps working.

Dual-zone control

Each side of the bed runs its own temperature. Cool one side, warm the other. Nobody compromises.

60°–104°F range

From genuinely cold to gently warm, driven by circulating water, not fans blowing air.

±0.5°F precision

Holds your exact temperature all night. No drift, no 3am surprises.

Whisper-quiet

≤28 dB is quieter than a library. You will forget the dock is running.

No app required

Set your temperature right on the Dock. No pairing, no updates, no account, no phone on your nightstand.

No subscription, ever

Every feature is included on day one. Nothing is locked behind a monthly fee. You own it outright.

The HydroLoop system in a calm modern bedroom

The whole bed

One cover. Two sides. Zero noise.

Set it once

Cold in three steps. No app required.

1

Fit the cover

Stretches over your mattress like a fitted sheet. No new bed, no tools.

2

Set your temperature

Anywhere from 60°F to 104°F. Each side picks its own on Queen & King.

3

Sleep cold, all night

Water circulates quietly, holding you to ±0.5°F until morning.

The science

The loop in HydroLoop

Water moves heat ~25× better than air. HydroLoop keeps it moving, hundreds of times a night.

1 · ChillThe Dock cools water to your setting, as low as 60°F.
2 · CirculateA quiet pump sends it through channels in the cover.
3 · AbsorbThe water pulls heat out of the bed, and out of you.
4 · ReturnIt sheds the heat at the Dock, and goes again.

What’s in the box

Three parts. One cold bed.

Everything arrives together and sets up in under 30 minutes. No tools, no installer.

The HydroLoop cover fabric and branded tag
01 · The Cover

Fits like a fitted sheet

A quilted, water-channeled cover that goes over the mattress you already own, from Twin through Cali King. Your sheets go on top; nobody feels a thing but the cold.

The HydroLoop dock on a nightstand
02 · The Dock

The quiet engine

Chills (or warms) water and circulates it through the cover all night at ≤28 dB. Sits on a nightstand or the floor and draws ≤200W, less than a desktop computer.

The HydroLoop Dock control panel
03 · The Controls

Right on the Dock

Tap the Dock’s built-in panel to set each zone’s temperature. The system holds it to ±0.5°F until morning. No app required, ever.

The details

Specs & dimensions

Temperature range
60°F – 104°F
Precision
±0.5°F hold
Noise
≤28 dB
Max power draw
≤200W
Zones
Dual on Queen & largerSingle-zone on Twin & Full
Control
On-Dock panelNo app, no account
Sizes
Twin 38×75 · Full 54×75Queen 60×80 · King 76×80 · Cali King 72×84 (inches)
Fits
Your existing mattressGoes on like a fitted sheet; adjustable bases OK
In the box
Cover + DockConnection kit & quick-start guide
Setup
Under 30 minutesNo tools required
Warranty
2 years
Trial
100 nightsRisk-free

Cool your bed. Save on the AC.

Skip cranking the whole-home AC all night and let the bed do the work. Compared to running central air overnight, HydroLoop can save you up to $125 a month on summer cooling.*

~$125saved per month*

*Estimated savings vs. running central AC 8 hours nightly for a month at U.S. average residential electricity rates; actual savings vary with usage, rates, and climate.

Let’s address it

“What about leaks? What about mold?”

Fair questions for anything with water in it. Here’s how HydroLoop is engineered so neither keeps you up at night.

Cutaway of the HydroLoop cover: sealed water channels beneath a dry quilted sleep surface

The water never touches you

Water runs through sealed channels inside the cover. You sleep on dry, quilted fabric. No exposed water on the sleep surface, ever.

A sealed, low-pressure loop

Not household plumbing. Just gentle, low-pressure circulation with quick-connects that seal shut the moment they’re unplugged.

Closed means clean

Sealed from open air, so there’s nowhere for growth to take hold. A capful of cleaning solution every few months keeps it fresh.

And it’s covered anyway

The Dock, cover, and every connection are protected by the 2-year warranty, plus the 100-night sleep trial.

Straight answers

The questions every hot sleeper asks

Does it actually get colder than the room?
Yes. That's the whole point. HydroLoop circulates chilled water through the cover to pull heat out of the bed, cooling the sleep surface as low as 60°F and holding it to ±0.5°F. Sleep on it 100 nights; if it doesn't get colder than your room, send it back.
Is there a subscription or an app?
No, and no. There is no subscription, ever, and no app to babysit. You control everything right on the Dock, no phone needed. You own it outright.
Will it fit my mattress?
It stretches over your current mattress like a fitted sheet, in Twin, Full, Queen, or King. No new bed required. The unit sits beside or under the bed; low-clearance frames are supported.
What if it doesn't work for me?
Sleep on it for 100 nights. If you're not sleeping colder, send it back for a full refund, with free shipping both ways. It's backed by a 2-year warranty, so reliability isn't your risk to carry.
How long does setup take?
Under 30 minutes, no tools. Stretch the cover over your mattress like a fitted sheet, connect it to the Dock, fill the reservoir with water, and set your temperature on the Dock’s panel.
How much power does it use?
At most 200W, less than a desktop computer. A full night of cooling costs roughly a quarter in electricity at average U.S. rates, a fraction of running whole-home AC overnight.
What comes in the box?
Everything you need: the water-channeled Cover in your size, the Dock (the engine), the connection kit, and a quick-start guide.
Does it work with adjustable bases?
Yes. The cover is flexible and moves with your mattress, so adjustable frames and bases are fine. The Dock just needs to sit within hose reach. A nightstand or the floor both work.
What happens if it leaks?
The loop runs at low pressure, nothing like household plumbing, and the fittings are quick-connects that seal shut the instant they're unplugged. The water itself stays inside sealed channels in the cover, away from the sleep surface. And if anything ever isn't right, the 2-year warranty covers the Dock, the cover, and every connection.
Can mold grow in the water?
The loop is closed and sealed from open air, which is what growth needs to take hold. Maintenance is simple: add a capful of cleaning solution when you top up the reservoir, roughly every few months, and the water stays fresh. The cover surface itself stays completely dry.

Ready to sleep cold

Keep your bed. Lose the heat.

$1,295 One-time · No subscription, ever
Add to cart
100-night sleep trial · Free shipping · 2-year warranty
HydroLoop Complete Sleep & Comfort System Queen · dual-zone · from $108/mo with Affirm · 100-night sleep trial
Queen · Dual-zone $1,295
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