MellowSleep CloudCool™ Comforter Review: Eucalyptus Cooling at an Honest Price
Score: 8.2/10 | Price: $79 | Best For: Best Under $80 — eucalyptus cooling at the lowest tested price
The MellowSleep CloudCool™ enters a crowded field dominated by $150–$300 eucalyptus comforters. At $79, it’s the most affordable eucalyptus-blend option we’ve tested — and it punches well above its price point for hot sleepers.
We tested it for 60 nights across three body types: a warm sleeper, a cold sleeper, and a night sweat sufferer. Here’s what we found.
First Impressions & Unboxing
The CloudCool™ arrives vacuum-compressed. Once removed, it lofts to full size within 30 minutes. The shell has a subtle cool-to-touch feel immediately — not dramatically icy, but noticeably cooler than a standard polyester comforter. The fill is evenly distributed with no clumping detected out of the box.
Materials & Construction
The CloudCool™ uses a eucalyptus-blend shell (eucalyptus lyocell + cotton) with a down-alternative fill. This hybrid approach keeps costs lower than pure eucalyptus options while retaining meaningful cooling benefits.
- Shell: Eucalyptus lyocell blend — breathable and naturally moisture-wicking
- Fill: Down-alternative microfiber with cooling treatment
- Construction: Box-stitch baffle pattern for even fill distribution
- Weight: Lightweight — suitable for hot sleepers in warm climates
Cooling Performance (Lab Data)
| Metric | CloudCool™ | Category Average |
|---|---|---|
| Surface temp drop (20 min) | −3.8°F | −4.1°F |
| Breathability | 2.8 L/s | 3.1 L/s |
| Moisture wicking rate | 4.1 g/hr | 4.4 g/hr |
| Heat dissipation at 4 hrs | +1.6°F above ambient | +1.4°F |
The CloudCool™ slightly underperforms the category average in raw lab metrics — but the delta is small, and its $79 price makes the gap easy to accept. For the money, this is exceptional performance.
For comparison: the Buffy Breeze scored higher on breathability at $179 but offers only modest real-world advantages for typical sleepers.
Comfort & Feel
Three testers slept under the CloudCool™ for 14 nights each. Consensus:
- Warm sleeper: Slept cooler than with previous poly comforter. Occasional warmth at 3–4 AM but no sweating.
- Cold sleeper: Felt slightly thin but comfortable in a 68°F room. Would recommend a higher fill weight for cold climates.
- Night sweats: Meaningful improvement. Fabric dried noticeably faster than cotton alternatives.
The shell has a softness that improves after the first wash. No rustling or crinkling sounds.
Durability (10-Wash Test)
After 10 wash cycles (cold, gentle cycle / tumble dry low):
- Fill clumping: None detected
- Shell integrity: No pilling or thinning
- Cooling performance: ~5% reduction in surface temperature drop (within acceptable range)
- Color: Maintained bright white
Who Should Buy the MellowSleep CloudCool™
Great for:
- Hot sleepers on a budget who want eucalyptus benefits without premium pricing
- Warm-climate sleepers (70°F+ bedrooms)
- Anyone replacing a heavy poly comforter for the first time
Skip if:
- You sleep in a cold room (below 65°F) — the lightweight fill may feel thin
- You want maximum breathability — the REST Evercool or Buffy Breeze outperform here
- You need a luxury feel — the shell is comfortable but not silky
Where to buy: MellowSleep CloudCool™ Comforter →
Related: Best Cooling Comforters for Hot Sleepers | Eucalyptus vs. Bamboo Comforters | Cooling Comforter Buying Guide