Lull Original vs Casper The One
Detailed side-by-side comparison — pricing, specs, performance ratings, and our pick.
| Feature | Lull Original | Casper The One |
|---|---|---|
| Overview | ||
Type | foam | Memory Foam |
Firmness 1 = softest, 10 = firmest | 5 / 10 | 6 / 10 |
Queen Price Current / sale price | $679 | $799 |
Trial Period Return window | 365 nights | 100 nights |
Warranty | Lifetime | 10 years |
| Performance Ratings | ||
Cooling Hot sleepers | average | Low |
Motion Isolation Partners, light sleepers | Excellent | Excellent |
Pressure Relief Hip/shoulder pain | Excellent | Good |
Edge Support Sit/sleep near edge | average | Fair |
Durability Long-term performance | Good | Good |
| Compatibility & Features | ||
Adjustable Base Head/foot elevation | ✓ Yes | ✓ Yes |
Split King Support Two Twin XL per couple | — | ✓ Yes |
Dual Comfort Zones Different firmness per side | — | — |
Smart Features App, sensors, auto-adjust | — | — |
Financing | Available | Affirm |
| Materials & Safety | ||
Certifications Organic / non-toxic | None listed | CertiPUR-US |
Off-Gassing New-foam smell concern | — | CertiPUR-US certified foam |
| Best For | ||
Ideal sleeper profiles |
|
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| Actions | ||
Need Help Deciding?
For most sleepers, we recommend the Lull Original over the Casper The One. It scores higher in cooling, pressure relief, edge support and offers strong overall value at $679 (vs $799). The Casper The One is the better choice only if you have a strong preference for that brand's specific feel or design.
Lull Original vs Casper The One: What Actually Differs
The Lull Original is a foam build, while the Casper The One is a memory foam — that single difference drives most of the cooling, motion, and feel decisions below. The Casper The One stands 11" tall versus 10" for the Lull Original — a 1.0" gap that matters if you need deep-pocket sheets or are pairing with an adjustable base. The Casper The One is the firmer of the two at 6/10 (medium-firm), and the Lull Original sits at 5/10 (medium) — a meaningful enough gap that sleeper position and weight should drive the choice. The single largest performance gap is in pressure relief: the Lull Original rates noticeably higher than the Casper The One, which is the deciding factor if that dimension is high on your list. On a Queen, the Lull Original runs $679 versus $799 for the Casper The One — roughly $120 (15%) less, which is enough to factor into the decision unless the pricier model wins clearly on the specs you care about. Trial periods aren't symmetrical either: the Lull Original ships with a 365-night sleep trial versus 100 nights for the Casper The One, giving you a longer in-home runway to send it back if the feel doesn't land.
Which Is Better For Your Sleep Style?
Higher pressure-relief rating, which is what protects hip and shoulder contact points in the side position.
Firmness of 6/10 is closer to the medium-firm sweet spot back sleepers need for lumbar support (vs 5/10).
Firmer at 6/10 vs 5/10 — stomach sleepers need the extra support to keep the pelvis from sinking and arching the lower back.
Cooling rating not available for one or both mattresses — spec not available.
Durability and edge-support ratings are equivalent — either holds up.
Softer at 5/10 vs 6/10 — lighter sleepers compress less, so they typically need the softer of two options to get proper contouring.
Motion isolation rated the same on both — neither has a transfer-disturbance edge.
Price Comparison (Queen)
| Mattress | MSRP | Current | Sale? |
|---|---|---|---|
| Lull Original | $2,217 | $679 | Save $1,538 |
| Casper The One | $999 | $799 | Save $200 |
The Lull Original is the budget choice at $679 — $120 less than the Casper The One ($799). That's a 15% gap, which is worth weighing against the spec differences before deciding which delivers better value for your situation. Both are currently below MSRP.
Lull Original
Strengths
- ✓365-night trial matches Nectar — best trial period available for under $1,000
- ✓Lifetime warranty at a budget-friendly price
- ✓Three foam layers provide meaningful pressure relief
- ✓Strong Amazon presence makes purchasing and returning easy
Considerations
- —No cooling technology — not for hot sleepers
- —All-foam — less durable edge support than hybrids
Casper The One
Strengths
- ✓Zoned Support (shoulder/hip differentiation)
- ✓Solid motion isolation
- ✓Open-cell foam for breathability
- ✓100-night trial
Considerations
- —No active cooling
- —Fair edge support
- —All-foam (no coil bounce)
Who Should Buy Which?
Choose the Lull Original if you…
- →Hot sleepers
- →Side sleepers / pressure relief
- →Sitting near the edge
- →Budget-conscious shoppers