by For side sleepers who want a responsive hybrid under $1,200, Helix Midnight wins: coil airflow keeps you cool, pressure relief at the hips and shoulders is outstanding, and the lifetime warranty puts the 10-year Casper policy to shame. Casper Original (all-foam) edges ahead for strict motion isolation and costs $200-300 less, but its shorter 10-year warranty and slower foam feel make it the weaker long-term value. Neither are partners here, so our top-rated alternative is the Saatva Classic below.
Saatva Classic
9.4/10
- Dual coil-on-coil construction with zoned lumbar support pad
- 365-night trial, over 3x longer than Helix or Casper
- Free white-glove delivery: setup, old mattress removal
- Available in Plush Soft, Luxury Firm, and Firm so you dial in the feel
- Ships uncompressed, not roll-packed, so no standard box delivery
- $99 return fee if you decide it's not the right fit
At a similar or lower price than a Helix Midnight, the Saatva Classic hands you a coil hybrid with a far longer trial, a lifetime warranty, and white-glove service that neither Helix nor Casper come close to matching. If you're in this price range and debating the two, it's worth testing the Saatva first.
Helix Midnight vs Casper Original: what you're actually comparing
These two mattresses approach medium firmness from opposite ends of the construction spectrum. Helix Midnight is a hybrid, with a full 8-inch pocketed coil unit beneath 4 inches of foam layers. Casper Original is all-foam, three to four polyfoam layers stacked without a single spring. That difference drives almost every real-world outcome in this comparison.
Helix has been through a major 2025 update. The Midnight now sits at a true medium-firm 6/10 per NapLab lab testing, with an 8.73/10 overall score, outstanding edge support at 9.5/10, and excellent pressure relief at 9.0/10. The queen runs around $1,099 standard, though Helix frequently discounts. Casper Original lists for $799-$899 queen, all-foam, medium-firm 6-7/10, and carries a 10-year warranty. Neither Helix nor Casper are affiliate partners on this site, so there's no bias pulling us either direction.
Construction and specs
| Spec | Helix Midnight | Casper Original |
|---|---|---|
| Type | Hybrid (pocketed coils + foam) | All-foam (polyfoam layers) |
| Height | 12" | 11" |
| Firmness | Medium-Firm 6/10 | Medium-Firm 6-7/10 |
| Layers | Quilted knit cover, 1" memory foam, 2 poly foam layers, 8" pocketed coils | Polyfoam top, zoned support foam (firmer under lumbar), high-density base |
| Queen price | ~$1,099 | ~$799-$899 |
| Trial | 120 nights | 100 nights |
| Warranty | Lifetime | 10 years |
| Free returns | Yes | Yes |
Where Helix Midnight wins
- Cooling — Coil airflow lets heat escape through the support core; NapLab measured max surface temperature at 89.9°F with rapid 7.7°F dissipation in the first minute, rated 9.0/10. All-foam constructions like the Casper trap more heat.
- Edge support — Helix Midnight scored 9.5/10 at NapLab with only 3 inches of sitting compression, among the strongest they've measured. Casper Original foam perimeter compresses considerably more, so the usable sleep surface is smaller.
- Bounce and ease of repositioning — The coil core makes it easy to roll over or shift positions at night, which matters for combination sleepers. All-foam mattresses absorb energy and respond more slowly.
- Warranty length — A lifetime warranty versus Casper's 10 years is a meaningful long-term protection difference, especially if you plan to keep the mattress beyond a decade.
- Split king option — Helix sells each side of a split king separately, letting couples pick different firmness levels. Casper has no equivalent.
Where Casper Original wins
- Motion isolation — All-foam deadens cross-mattress motion better than any hybrid. If a partner's movements wake you, the Casper Original foam will contain them more effectively.
- Price — At $799-$899 queen, Casper Original costs roughly $200-$300 less than Helix Midnight. For budget-conscious buyers, that's real money.
- Zoned lumbar support — The Casper Original uses a firmer foam zone under the lumbar and softer foam at the shoulders, making it a reasonable choice for back sleepers who want zoned support without coils.
Head-to-head performance comparison
| Category | Helix Midnight | Casper Original |
|---|---|---|
| Cooling | Excellent (9.0/10, NapLab) | Moderate (all-foam retains heat) |
| Pressure relief | Excellent (9.0/10, NapLab) | Good (zoned foam helps) |
| Edge support | Outstanding (9.5/10, NapLab) | Moderate (foam compression) |
| Motion isolation | Good (8.5/10, NapLab) | Excellent (all-foam advantage) |
| Bounce/ease of movement | Good | Low (slow-response foam) |
| Side sleepers | Excellent | Good |
| Back sleepers | Good | Good (zoned lumbar) |
| Hot sleepers | Excellent (coil airflow) | Average |
| Couples, motion sensitive | Good | Excellent |
| Trial period | 120 nights | 100 nights |
| Warranty | Lifetime | 10 years |
Who should pick which
Go with Helix Midnight if you sleep hot, spend most nights on your side and need real pressure relief at the hips and shoulders, share the bed with someone who likes the option of different firmness per side, or plan to keep the mattress long enough that a lifetime warranty matters.
Go with Casper Original if you or your partner are extremely sensitive to motion and a foam construction's isolation is the top priority, your budget is closer to $800 than $1,100, or you mainly sleep on your back and want zoned lumbar support from a simple foam design.
Why the Saatva Classic is worth a look
Both mattresses have real strengths, but both also have hard limits: Casper's 10-year warranty and all-foam feel, Helix's 120-night trial window. The Saatva Classic steps above both on the dimensions that matter most over time: a 365-night trial window so you're not guessing after 100 days, a lifetime warranty, and a dual coil-on-coil build that combines the bounce and support of innerspring with a Euro pillow-top that handles pressure relief. White-glove delivery is included at no charge, which Helix and Casper don't offer. At roughly $1,395 queen during typical promo pricing, it's in the same conversation.
Helix Midnight edges Casper Original on cooling, edge support, bounce, and long-term warranty. Casper Original edges Helix on motion isolation and price. For most buyers in this price range, the Saatva Classic outperforms both on the trial period, warranty, and service while staying price-competitive.
Frequently asked questions
Is Helix Midnight or Casper better for side sleepers?
Helix Midnight. Its hybrid coil base and memory foam pressure layer score 9.0/10 for pressure relief in NapLab testing, specifically excelling at hip and shoulder zones. Casper Original's all-foam zoning is decent but not as precise, and without coils the bounce is limited when you shift positions at night.
Which mattress sleeps cooler, Helix Midnight or Casper Original?
Helix Midnight by a clear margin. The 8-inch coil unit acts as a ventilation channel; NapLab recorded a maximum surface temperature of 89.9°F and fast heat dissipation. Casper Original's all-foam layers trap more body heat, which is a known limitation of foam-only constructions.
How do the warranties compare?
Helix Midnight carries a lifetime warranty. Casper Original covers 10 years. That's a major difference if you're keeping the mattress for 12 to 15 years.
Is the Casper Original good for couples?
For motion isolation, yes. All-foam deadens partner movement better than most hybrids. But if one partner sleeps hot, the Casper's limited airflow becomes a problem quickly. Helix's split king option, which lets each side be a different model, is a strong advantage for couples with different preferences.
What's the price difference between Helix Midnight and Casper Original?
Casper Original typically lists for $799-$899 queen. Helix Midnight runs around $1,099 queen, though both brands run frequent discounts. That $200-$300 gap is real, but Helix's lifetime warranty and 120-night trial (vs Casper's 100 nights and 10-year warranty) shift the value calculation over the long term.