The 365-night trial is Lull’s headline differentiator and it’s longer than it needs to be to know whether a mattress works for you. Most mattress fit decisions are clear within the first 30–60 nights of regular sleep. Lull offers the full year because they’re confident in the product and because the long trial removes the largest psychological barrier to buying a mattress online.
Whether the mattress itself backs up that confidence is what this review covers.
Quick Highlights
✅ 365-night trial — the longest trial period in the accessible mattress market
✅ Three-layer foam construction — gel-infused top for cooling, transitional mid-layer, dense base
✅ Free delivery and removal of old mattress
✅ Lifetime warranty
✅ Medium-firm feel — designed for the widest range of sleeping positions
✅ CertiPUR-US certified foam — no ozone depleters, heavy metals, or formaldehyde
❌ $795–$1,295 price range — mid-range, not budget
❌ Memory foam sleeping warm is a documented issue — gel helps but doesn’t fully solve it
❌ Off-gassing smell when first unpacked — standard for compressed foam, dissipates in 24–48 hours
❌ Edge support less strong than innerspring or hybrid alternatives
Best for: Back and side sleepers who want medium-firm support without the mechanical feel of innerspring, and who want a genuine long trial to confirm the fit.
The Three-Layer Construction
Top layer — gel-infused memory foam: The gel is specifically addressing memory foam’s most consistent complaint, which is that it sleeps warm. Memory foam retains heat because it’s dense and doesn’t allow air circulation. Gel infusion absorbs and disperses heat, reducing surface temperature relative to non-gel memory foam. It doesn’t fully solve the problem — buyers who sleep very warm will still notice heat retention — but it meaningfully improves on standard memory foam.
Middle layer — transitional foam: Provides the responsiveness that pure memory foam lacks. Memory foam’s slow response is the “sinking in” feeling that some people love and others find uncomfortable. The transitional layer adds a degree of bounce-back that makes movement during sleep easier.
Base layer — high-density foam: The structural foundation that determines the mattress’s firmness and support durability. High-density foam maintains its shape over years of use — this is what prevents the body-shaped depressions that medium-density foam develops over time.
Best Lull Products Worth Buying
Available at lull.com
Best for: Back and side sleepers, couples who share a sleeping position preference, first-time mattress buyers who want the security of a long trial
Top Features:
- 365-night trial — longest in the accessible market
- Lifetime warranty — permanent quality commitment
- CertiPUR-US certified foam
- Free delivery and old mattress removal
- Medium-firm feel accommodates multiple sleeping positions
One Honest Drawback: Edge support is below what innerspring or hybrid mattresses provide at the same price. If you sleep near the edge of the bed, this is a relevant consideration.
Verdict: The mattress for buyers who want the lowest-risk quality mattress purchase. 365 nights of actual sleeping is enough data to know.
What Customers Actually Think
- “The 365-night trial is what made me buy it. I’ve been burned by online mattress purchases before. Having a year to decide removed that anxiety completely.”
- “The gel top layer does help with temperature. I sleep warm and I’ve slept measurably better since switching — not perfectly cool, but better.”
- “Medium-firm is accurate. Not hard, not soft. My partner and I disagree about firmness preference and this is the compromise that works for both.”
- “The off-gassing smell on delivery was more noticeable than I expected. It’s gone in two days but those first two nights I slept elsewhere.”
- “The lifetime warranty was the detail that tipped me over. Mattress companies that offer lifetime warranties are committed to building something that lasts.”
Is Lull Worth It?
For buyers who want a quality mattress with the lowest purchasing risk: yes — 365 nights is the most generous trial in the category.
For hot sleepers specifically: the gel helps but a hybrid or the Eight Sleep Pod 4 addresses the temperature problem more directly.
For buyers comparing to budget mattresses: the Lull’s foam density and warranty commitment justify the price difference.
Overall Rating: 8.2 / 10
Category | Score |
Comfort | 8.5 / 10 |
Temperature Regulation | 7.5 / 10 |
Edge Support | 7 / 10 |
Trial Period | 10 / 10 |
Value for Money | 8 / 10 |
Durability | 8.5 / 10 |
Overall | 8.2 / 10 |
