by The Beautyrest Black Hybrid X Class Medium is a premium hybrid with T3 triple-strand pocketed coils, BlackICE 4.0 cooling technology, and a 14-inch profile. It performs well for back and side sleepers under 230 lb who prioritize cooling and motion isolation. At $2,800+ queen, it is one of the most expensive mainstream hybrids available. If you want equivalent coil-hybrid quality at a significantly lower price, the Saatva Classic is our top-rated alternative: dual-coil construction, reinforced lumbar zone, 365-night trial, and free white-glove delivery.
Saatva Classic
9.2/10
- Dual individually-wrapped coil system with reinforced lumbar zone pad
- Three firmness options (Plush Soft, Luxury Firm, Firm) to match any sleeper profile
- Free white-glove delivery with in-room setup and old-mattress removal
- 365-night home trial and lifetime warranty, best-in-class policies
- Ships flat, not compressed in a box, so requires coordination with the delivery team
- $99 return fee applies during the trial period
For sleepers drawn to the Beautyrest Black X Class, the Saatva Classic delivers comparable coil-hybrid performance, three firmness choices, and superior trial terms at roughly half the price. It is our top-rated innerspring hybrid for most sleepers.
Beautyrest Black Hybrid X Class Medium: full review
The Beautyrest Black Hybrid X Class Medium sits at the top of Simmons' luxury hybrid lineup. It combines T3 Pocketed Coil Technology with a layered comfort system built around BlackICE 4.0 phase-change material, self-response latex, and RightTemp memory foam. The result is a 14-inch mattress aimed at sleepers who want a responsive, cool, and pressure-relieving feel and are willing to pay premium-tier prices for it.
Construction and materials
Working from the bottom up, the X Class Medium is built as follows:
- T3 Pocketed Coils (base): Triple-strand wire coils, meaning three thin wires braided together instead of a single thick wire. This absorbs energy more efficiently for quieter motion isolation and delivers more responsive rebound than standard pocketed coils.
- Firm transition foam: A foundational layer that bridges the coil base and the comfort system, preventing you from feeling the coils directly.
- Beautyrest Gel Memory Foam: The first comfort layer provides pressure point relief and a secondary cooling contribution via gel infusion.
- RightTemp Memory Foam: Carbon-based fiber infused into the foam helps dissipate body heat. It conforms closely to the body for added pressure relief at the shoulders and hips.
- Self-Response Latex: A buoyant latex layer just below the cover adds responsiveness and prevents the deep sinkage that all-foam sleepers sometimes dislike. This is the layer most side sleepers notice as the X Class feels supportive without being rigid.
- BlackICE 4.0 Hybrid Surface: The top comfort system, combining phase-change material with a SurfaceCool fiber cover woven with diamond-infused yarn. Phase-change material absorbs heat when you get in, then releases it away from the body to regulate surface temperature.
The overall construction measures 14 inches tall and carries a queen MSRP of $2,800 to $3,200 depending on retailer and promotions.
Firmness and feel
The X Class Medium registers at 5 to 6 out of 10 on the firmness scale, landing squarely in medium territory. On the surface, it feels plush and responsive, owing to the latex and BlackICE layers. Deeper in, the T3 coils push back with noticeable support, which prevents excessive sinkage for average-weight sleepers.
Back sleepers under 230 lb will find the lumbar zone supported without the mattress feeling firm underfoot. Side sleepers between 130 and 230 lb benefit from the latex layer keeping the hips and shoulders cradled without dropping too far into the foam. Stomach sleepers may find the medium feel too soft for adequate hip support, and sleepers above 230 lb may sink through the comfort layers and feel the coil base more than intended.
Cooling performance
This is where the X Class Medium earns its price premium. The combination of BlackICE 4.0 phase-change surface, diamond-infused SurfaceCool fiber cover, carbon-based RightTemp foam, and an open coil base for airflow creates one of the most effective thermal management systems in the mainstream hybrid market. Hot sleepers who have found memory foam mattresses too warm, and who can budget for the X Class, typically report significantly cooler nights.
Motion isolation
T3 triple-strand coils isolate motion better than single-wire pocketed coils because the braided construction absorbs energy internally rather than transferring it laterally. Coupled with the foam layers above, the X Class Medium is a solid choice for couples with different sleep schedules. It will not match an all-foam mattress for motion isolation, but it outperforms most hybrid alternatives in its price class.
Edge support and durability
The perimeter coils in the X Class are reinforced to extend usable sleep surface close to the edges, which matters for couples who share a queen and want to use the full width. Edge support is firm and consistent in our testing. Durability is rated at 8 to 10 years based on Beautyrest's use of high-carbon steel coils and quality foam layers. Beautyrest backs the X Class with a 10-year warranty.
Price and sizing
| Size | Dimensions | MSRP (approx.) |
|---|---|---|
| Twin XL | 39" x 80" | ~$2,350 |
| Full | 54" x 75" | ~$2,630 |
| Queen | 60" x 80" | ~$2,800 |
| King | 76" x 80" | ~$3,300 |
| Cal King | 72" x 84" | ~$3,300 |
The X Class Medium is sold through authorized Beautyrest retailers. It does not come compressed in a box. The mattress ships fully assembled via white-glove or threshold delivery depending on the retailer. A 10-year warranty is standard. Trial period terms vary by retailer since Beautyrest sells primarily through third-party stores rather than direct-to-consumer.
Pros and cons
- T3 triple-strand coil system provides excellent motion isolation for a hybrid
- BlackICE 4.0 with diamond-infused cover is among the best cooling systems on a mainstream hybrid
- Self-response latex adds responsiveness that prevents the sluggish feel of all-foam beds
- RightTemp memory foam relieves pressure at shoulders and hips
- Strong edge support extends usable sleep surface for couples
- Made in the USA
- $2,800+ queen price is high relative to most competitors with comparable performance
- Only one firmness option in the X Class range, limiting fit for stomach sleepers or heavy sleepers
- Trial and return terms vary by retailer rather than being standardized direct-to-consumer
- 10-year warranty is shorter than Saatva Classic's lifetime warranty
- Not suited for sleepers above 230 lb who need firmer support
Who should buy the Beautyrest Black Hybrid X Class Medium
- Back and side sleepers between 130 and 230 lb who want a responsive, bouncy hybrid surface rather than a slow-conforming foam bed.
- Hot sleepers who have found other hybrids too warm and are willing to pay for BlackICE 4.0 technology.
- Couples who move around at night and want better motion isolation than a standard innerspring, without giving up the responsive coil feel.
- Those already committed to the Beautyrest Black lineup who are choosing between models and want the brand's most advanced option.
Who should consider an alternative
- Sleepers above 230 lb who need firmer support throughout. The Saatva Classic in Firm or the Saatva HD are better fits.
- Stomach sleepers who typically need a firmer surface to prevent hip drop.
- Budget-conscious shoppers. The X Class performs well, but the Saatva Classic delivers comparable coil-hybrid quality at roughly half the queen price, with a longer trial and better warranty.
- Anyone who values a long standardized trial. The 365-night trial and lifetime warranty from Saatva, or the 100-night trial from other direct-to-consumer brands, are meaningfully better than the retailer-variable terms on the Beautyrest.
The Beautyrest Black Hybrid X Class Medium is a well-engineered luxury hybrid with genuine cooling and motion isolation advantages. Its main drawback is price: at $2,800+ queen with retailer-variable trial terms, it asks a lot when alternatives like the Saatva Classic deliver comparable or better performance at a lower price with a 365-night trial and lifetime warranty.
Frequently asked questions
How firm is the Beautyrest Black Hybrid X Class Medium?
The X Class Medium rates 5 to 6 out of 10 on firmness, which is a true medium feel. It has a soft, responsive surface from the BlackICE layers and latex, with firmer underlying support from the T3 coils. Most back and side sleepers at average weight find this the ideal balance.
Does the Beautyrest Black Hybrid X Class come in a box?
No. The X Class ships as a fully assembled mattress through white-glove or threshold delivery via authorized retailers. It does not compress into a roll-pack box.
What is T3 Pocketed Coil Technology?
T3 refers to triple-strand wire pocketed coils: three thin wires braided together form each coil rather than a single thick wire. This design absorbs lateral movement more efficiently, improving motion isolation and providing more consistent responsive support compared to conventional pocketed coils.
Is the Beautyrest Black Hybrid X Class good for hot sleepers?
Yes. The combination of BlackICE 4.0 phase-change material, a SurfaceCool fiber cover with diamond-infused yarn, and carbon-based RightTemp memory foam places this mattress among the better options for temperature regulation in the mainstream hybrid segment.
What is the warranty on the Beautyrest Black Hybrid X Class?
Beautyrest provides a 10-year warranty on the X Class. This covers manufacturing defects and significant sagging. By comparison, the Saatva Classic comes with a lifetime warranty.
What is the best alternative to the Beautyrest Black Hybrid X Class Medium?
The Saatva Classic is our top recommendation. It uses a dual individually-wrapped coil system with a reinforced lumbar zone, offers three firmness options, ships with free white-glove delivery, and comes with a 365-night trial and lifetime warranty at a queen price roughly $1,000 below the X Class.
Saatva Classic
9.2/10
Dual-coil luxury hybrid with reinforced lumbar zone, three firmness options, free white-glove delivery, 365-night trial, and lifetime warranty. Our top-rated coil hybrid at a significantly lower price than the Beautyrest Black X Class.