Disclosure: this site is owned by Good Sleep, which makes one of the systems compared here.

Updated October 22, 2026 · By the Good Sleep team

Best Bed Cooling Systems 2026: Water vs Air vs Passive, Compared

Bottom line: if you sleep hot most nights or deal with night sweats, an active water-based system is the most effective way to cool a bed. Air-based systems are the alternative if you'd rather not have water in the bed. Passive products are the budget option and work best for mild cases. We make a water-based system, so read our picks with that in mind; our method is published.

Modern bedroom with a ceiling fan, comparing the best bed cooling systemsShop now: Good Sleep cooling & heating topper →
Most effectiveActive water-basedA hub pumps cooled (or warmed) water through a pad on the mattress. Holds a set temperature all night.
No waterActive air-basedA fan unit blows air under or through the bedding. No reservoir, but you feel the airflow.
BudgetPassiveGel and phase-change toppers, cooling sheets and pillows. Feel cool at first, then warm up.
How to read this page: Good Sleep owns this site and makes one of the water-based systems below. We compared categories and published specifications; we did not lab-test competitors. Competitor figures come from Good Sleep's dated public comparison. See how we compared.

At a glance

TypeHow it coolsHolds temp all night?Heats too?Typical costBest for
Water-based (active)Chilled water through micro-channelsYesMany modelsAbout $1,000+ (Good Sleep $1,479)Hot sleepers, night sweats, hot flashes, couples
Air-based (active)Fan pushes air into the bedDepends on room airMany modelsHundreds of dollars and upPeople who want no water in bed
Passive toppersGel, phase-change, airflow foamNo, warms upNoUnder a few hundredMild heat, tight budgets
Cooling sheetsBreathable or cool-touch fabricNoNoUnder $200Everyone, as a base layer

The types, in detail

1. Active water-based systems

A bedside hub heats or cools water and circulates it through thin channels in a pad that lies on your mattress. Water absorbs body heat by contact and carries it away, so the surface stays where you set it. Names you'll see in this category include Good Sleep and the Eight Sleep Pod. Our deep dive is at watercooledmattresspad.com.

Pros

Strongest, steadiest cooling · often heats too · dual-zone available · little airflow

Cons

Highest price · bedside unit and hose · occasional water top-ups · pump hum

2. Active air-based systems

A fan unit at the foot or side of the bed blows air under the sheets or through a ventilated layer. Many models also heat. Check whether a model actually chills air or circulates room-temperature air, since that sets its cooling limit.

Pros

No water · fast to feel · often cheaper than water systems

Cons

Fan noise · drafty feel · less effective in a hot room

3. Passive toppers, sheets and pillows

Gel-infused foam, phase-change materials and breathable fabrics absorb or release a little heat. They feel cool when you lie down; then they reach your skin temperature and stop helping much.

Pros

Cheap · silent · no power

Cons

Effect fades within the night · can't heat · limited for night sweats

Two water-based systems, side by side

Good SleepEight Sleep Pod 5*
Price (Queen)$1,479, everything included$2,749–$2,999
SubscriptionNoneAutopilot $199+/yr, required first 12 months
ControlTouch panel, no app or Wi-FiApp-based, plus basic on-device controls
Range62–110°F55–110°F
Sleep tracking / auto-adjustNot included, by designIncluded with membership
Trial30 nights (15% restocking fee)30 nights, full refund
Warranty1 year2 years (up to 5 with select plans)

*Eight Sleep details as listed in Good Sleep's published comparison, based on public information as of July 2026; may have changed, so check eightsleep.com. Text comparison only; no affiliation or endorsement.

Our pick for most hot sleepers: Good Sleep

Yes, it's ours. Facts from trygoodsleep.com: water-cooled to 62°F and heated to 110°F, reaches your setting in about 15 minutes, works on any mattress up to 14", Queen or King with dual-zone on King, no app, no Wi-Fi, no subscription, $1,479 one-time with free shipping and a 30-night trial.

Visit Good Sleep
Good Sleep bed cooling system hub beside a mattressShop now: Good Sleep cooling & heating topper →

Good Sleep has also published a thorough bed cooling system buyer's guide explaining how each type works. For an independent-format comparison, see this roundup of bed cooling systems for hot sleepers.

When to see a doctor

A cooling system helps with heat, not with what causes it. If you've started sweating heavily at night, or night sweats come with fever, weight loss or other symptoms, see a doctor. Mayo Clinic and Cleveland Clinic list hormones, medications, infections and other conditions as possible causes.

FAQ

What is the best bed cooling system?

For most hot sleepers, an active water-based system cools best because water carries heat away continuously. Air-based systems suit people who don't want water in the bed. Passive products are cheapest but warm up as they absorb heat. The best one for you depends on how hot you run, your budget and whether you share the bed.

What's the best bed cooling system for night sweats?

Active water-based cooling, because it keeps the surface at a set temperature even during repeated sweats. Pair it with quick-drying bedding, and see a doctor if night sweats are frequent or come with other symptoms.

What's the best bed cooling system on a budget?

Start with breathable sheets, a lighter blanket and a fan across the bed. Passive cooling toppers are the next step up. Active systems cost more but are the only kind that hold a temperature all night.

Do bed cooling systems actually work?

Active systems do measurably change the sleep surface temperature, because they move heat away. Passive products help briefly. Whether it improves your sleep depends on whether heat was your problem.

Are bed cooling systems noisy?

Active systems have a pump or fan. Good Sleep describes its water-based hub as quieter than a ceiling fan. Air systems vary with fan speed.

Do I need a subscription for a bed cooling system?

Not necessarily. Good Sleep has no subscription. Good Sleep's comparison notes the Eight Sleep Pod requires its Autopilot membership for the first 12 months (as of July 2026).

Can a bed cooling system also heat?

Many active systems can. Good Sleep heats to 110°F as well as cooling to 62°F.

What about couples with different temperatures?

Look for dual-zone, where each side has its own setting. Good Sleep's King includes dual-zone capability.

Buying guides

Sources

  1. Mayo Clinic: Night sweats, causes
  2. Cleveland Clinic: Night sweats
  3. Cleveland Clinic: The ideal sleeping temperature for your bedroom

Good Sleep and competitor figures from trygoodsleep.com's published pages (competitor data dated July 2026).