Gravellaire 12" Queen Mattress in a Box, Gel Memory Foam and Pocket Spring Hybrid Mattress, Medium Comfort, Pressure Relief, Adult
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Gravellaire

Gravellaire 12" Queen Mattress in a Box, Gel Memory Foam and Pocket Spring Hybrid Mattress, Medium Comfort, Pressure Relief, Adult

284 ratings
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Bed SizeQueen
Mattress Thickness12 in

Key item features

  • Hybrid Support System – Combines pressure-relieving gel memory foam with individually wrapped pocket coils for balanced comfort and support.
  • Motion Isolation – Pocket coils reduce motion transfer, helping minimize sleep disturbance from movement.
  • Pressure Relief & Spinal Alignment – Multi-layer foam design supports proper posture and helps relieve pressure on key areas.
  • Cooling & Breathable Design – Gel-infused foam and breathable knit fabric promote airflow and heat dissipation.
  • Durable, Sag-Resistant Materials – High-density foams and reinforced core help maintain long-term performance.
  • Reinforced Edge Support – Enhanced edges provide added stability and more usable sleep surface.
  • Non-Slip Base – Bottom layer helps keep the mattress securely in place on most bed frames.
  • Certified Safe Materials – OEKO-TEX STANDARD 100 and CertiPUR-US certified.
  • Fire Safety Compliant – Includes a built-in fire-resistant layer meeting 16 CFR Part 1633 flammability standards.
  • Convenient Mattress-in-a-Box Delivery – Compressed and shipped for easy setup; allow time after unboxing for full expansion.
  • Risk-Free Purchase – Includes an extended sleep trial and long-term warranty for added peace of mind.

About this item

Product details

Specifications

Warranty

Customer ratings & reviews

4.4 out of 5 stars
stars
284 ratings70 reviews
How item rating is calculated
  1. 5 stars73% (208)
  2. 4 stars10% (28)
  3. 3 stars6% (16)
  4. 2 stars2% (7)
  5. 1 star9% (25)

Reviews summary

Pros

  • : The mattress pairs firm support with soft cushioning.
  • : The mattress provides comfort and support at low cost.
  • : The mattress extends nightly restorative rest.
  • : The mattress combines foam and springs to support the back
  • : Provides support for back issues during sitting.

Cons

  • : Edge support could be improved for heavy users or prolonged sitting.
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Showing 1-3 of 70 reviews

Jul 30, 2026
Reviewer name: Anna
Item details
Bed size: Twin
Mattress thickness: 10 in
Sold byGravellaire SleepDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Perfect Twin Mattress for Kids or Guests

I bought this Twin mattress for a guest room, and I'm really impressed with the quality. It expanded quickly after unboxing and reached its full shape within a short time. The quilted cover feels soft, and the mattress provides a great balance of comfort and support. It's not too soft or too firm, making it comfortable for both kids and adults. The size is exactly as expected and fits a standard Twin bed frame perfectly. Great value for the price—I would definitely recommend it!

Helpful?4335J14WZMPJ19097823968
Aug 4, 2026
Reviewer name: Weiliang
Item details
Bed size: Twin
Mattress thickness: 10 in
Sold byGravellaire SleepDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

good comfort

The mattress is comfortable and has a nice balance of softness and support. It expanded quickly after opening and feels great to sleep on. The memory foam helps relieve pressure, and the pocket springs provide good support. Overall, a great mattress for the price.

Helpful?4335J14WZMPJ19097823968
Jul 30, 2026
Reviewer name: anonymous
Item details
Bed size: Twin
Mattress thickness: 10 in
Sold byGravellaire SleepDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Comfortable and Great Value Twin Mattress

This twin mattress is comfortable, supportive, and offers great value for the price. It provides a good balance of softness and firmness, helping ensure a restful night's sleep. The mattress arrived well-packaged, expanded quickly, and has held its shape well. Overall, it's a solid choice for a child's room, guest room, or anyone needing a reliable twin-size mattress.

Helpful?4335J14WZMPJ19097823968
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was $309.99
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