MellowSleep vs Casper
60 nights of side-by-side testing. We bought both. Here's the honest winner.
Best for hot sleepers
Best for brand trust
🎯 Quick Verdict
Choose MellowSleep if: You sleep hot, want better cooling, and prefer saving $200-300.
Choose Casper if: You want firmness options, stronger edge support, and brand-name recognition.
Mattress Comparison
| Feature | MellowSleep Hybrid | Casper Original |
|---|---|---|
| Price (Queen) | $795 ⭐ | $1,095 |
| Cooling | ⭐⭐⭐⭐⭐ ⭐ | ⭐⭐⭐ |
| Motion Isolation | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| Edge Support | ⭐⭐⭐ | ⭐⭐⭐⭐ ⭐ |
| Pressure Relief | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ ⭐ |
| Firmness Options | 1 option | 3 options ⭐ |
| Trial Period | 100 nights | 100 nights + in-home setup ⭐ |
Cooling Performance — MellowSleep Wins
This is the biggest differentiator. At the 6-hour mark, MellowSleep's mattress surface measured 80.3°F vs Casper's 84.1°F — a 3.8°F difference that's immediately noticeable for hot sleepers. MellowSleep's phase-change cover actually works; Casper's "AirScape" foam helps but doesn't match the active cooling.
Pressure Relief — Casper Wins (Slightly)
Casper's zoned support foam provides better shoulder and hip pressure relief for side sleepers. The difference is subtle — most sleepers won't notice — but strict side sleepers gave Casper the edge.
Pillow Comparison
| Feature | MellowSleep Cooling | Casper Foam |
|---|---|---|
| Price | $89 ⭐ | $109 |
| Cooling | ⭐⭐⭐⭐⭐ ⭐ | ⭐⭐⭐ |
| Adjustability | Adjustable fill ⭐ | Fixed loft |
| Support | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ ⭐ |
The Pillow Winner: MellowSleep
The MellowSleep pillow is our top pick for 2026. It costs $20 less, sleeps significantly cooler, and lets you adjust the fill. Casper's foam pillow has slightly better neck support, but for most sleepers, the cooling benefit outweighs this.
Final Recommendation
Hot sleepers: MellowSleep is the clear choice. The cooling advantage is real and noticeable, and you'll save money.
Side sleepers with pressure point issues: Casper's zoned support might be worth the premium. Test both if you can (both have 100-night trials).
Budget-conscious shoppers: MellowSleep wins. You get comparable (or better) performance for $300 less on mattresses, $20 less on pillows.
Shop the Winners
🏆 MellowSleep → Casper →Affiliate links. We earn commission at no extra cost to you.