Slumber Cloud Cooling Mattress Pad (Queen)
Best for: Hot sleepers without electronics, side sleepers, budget cooling
The passive cooling mattress pad — no cords, no pumps, just NASA-derived Outlast material that absorbs body heat.
Slumber Cloud's cooling pad uses NASA-developed Outlast phase-change material to absorb + release body heat as you sleep. No electronics — completely passive. Sits under your fitted sheet like a mattress protector. Machine-washable. Best for hot sleepers who don't want cords + pumps in bed.
Where to buy
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Should you buy it?
What we like
- NASA-derived Outlast absorbs heat passively
- No cords, pumps, or noise — zero maintenance
- Works with any bed instantly
What to know before buying
- Buffers heat spikes; can't beat a hot room
- Premium price for a mattress pad
- Effect is subtle vs active systems
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At a glance
How it scores
How our 8.3/10 breaks down — rated on the dimensions that matter most for cooling tech, from published specifications and third-party test data, not the marketing.
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Compare with alternatives
Quick verdicts for the cooling tech most often considered alongside the Slumber Cloud Cooling Mattress Pad (Queen).
Slumber Cloud Cooling Mattress Pad (Queen) vs BedJet 3 Climate Comfort System
The bed climate system — a unit under or beside the bed blows heated or room-temperature air between your sheets, controlled by app.
→ Couples with different temps, hot sleepers, non-Eight-Sleep alternative
BedJet 3 Climate Comfort System review →Slumber Cloud Cooling Mattress Pad (Queen) vs Chilipad 1.0 (formerly Chilipad Dock Pro) Cooling Mattress Pad (Queen)
The water-circulating cooling mattress pad — sits on top of your existing mattress, precise 55-115°F control.
→ Precise temperature control, non-Eight-Sleep alternative, couples
Chilipad 1.0 (formerly Chilipad Dock Pro) Cooling Mattress Pad (Queen) review →Slumber Cloud Cooling Mattress Pad (Queen) vs Molecule CopperWELL Cooling Adjustable Pillow
Adjustable gel-memory-foam pillow with a copper-infused cover; Molecule makes the cooling claim, but publishes no measured effect.
→ Hot sleepers wanting adjustable pillow, side sleepers, cooling-first
Molecule CopperWELL Cooling Adjustable Pillow review →Not sure which one is right for you?
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More cooling tech we compared
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Brooklinen Down Alternative Comforter (Queen)
LUXOME Ultra Cool Weighted Blanket (15 lb, 54x72")
Rest Evercool Cooling Comforter (Queen)
Elegear Arc-Chill Cooling Blanket (Queen)
Frequently asked questions
Slumber Cloud vs Chilipad Dock Pro?
Slumber Cloud is passive (no pump, no cords). Chilipad is active water circulation. Different price tiers, different features.
Does Outlast really work?
Yes — NASA-derived technology has real thermal absorption. Not as cold as active cooling but genuine improvement over standard cotton pads.
How does it wash?
Cold water, gentle cycle, tumble dry low. Preserves the phase-change material. Skip fabric softener.
Slumber Cloud vs bamboo cooling pad?
Both are passive. Slumber Cloud says its Outlast phase-change material absorbs excess body heat as you warm and releases it back as your temperature drops; bamboo pads just breathe better. For heat management without electronics, Slumber Cloud wins.