BedInABox Tranquillium Reviews: See Why 0 Shoppers Rated It 0 Stars!
Before adding the BedInABox Tranquillium mattress to your bedroom, see what 0 sleep lovers (and haters) said — and why it got a 0/5.


BedInABox Tranquillium Mattress Review: A Medium-Profile Memory Foam Choice for Comfort and Durability
In the crowded mattress market, finding a reliable, comfortable, and long-lasting option can be challenging. The BedInABox Tranquillium steps into this memory foam mattress category with a clear focus on home use and a medium-profile design crafted in the USA.
Built on certified eco-friendly materials and backed by a lengthy warranty, this mattress aims to blend comfort with durability. But does it truly stand out among other offerings? Let's delve deeper into its specifications and features to understand what it delivers on paper.
Detailed Specs & Features
The Tranquillium comes in the common mattress sizes ranging from Twin to King, each with a consistent depth of 12 inches for most sizes and around 11 inches for Queen and Split King options. This medium-profile height balances the need for a plush feel while maintaining substantial support underneath. According to specs, the mattress uses foam as its core material, layering gel-infused memory foam with polyfoam for enhanced comfort and pressure relief.
The comfort layer thickness of 3 inches incorporates gel foam and Tencel cooling technology to deliver temperature regulation, a crucial feature for sufferers of night sweats or those living in warmer climates. On paper, this design delivers excellent pressure relief and a 6.5 out of 10 softness rating, making it soft enough without sacrificing the support needed for multiple sleep positions.
Moreover, the mattress is CertiPUR-US, OEKO-TEX, and GREENGUARD Gold certified, assuring buyers of its safety and environmental standards. The use of Rayon as a flame retardant and high-density foam for reinforced edges adds further dimensions of safety and durability.
Adding convenience, the mattress boasts a bed-in-a-box setup with vacuum-sealed packaging and expands within approximately 24 hours after unboxing. A notable 20-year warranty and the inclusion of a 120-day trial period with a free return policy demonstrate the manufacturer's confidence in longevity and customer satisfaction.
User Experience & Performance (Based on Specs)
Design & Build
The Tranquillium's layered construction, featuring a mix of high-density foam and memory foam with gel infusion, speaks directly to consumers looking for balanced support and softness. Its medium indentation load deflection (ILD) score, ranging between 20 and 30 pounds, indicates a firm yet yielding mattress that adapts gently under body weight. The rotatable design allows users to flip the mattress to extend its use without complicating handling.
Performance
Performance-wise, the heavier models, such as Queen at 90 pounds and King at 113 pounds, reflect dense construction, which in real-world terms translates to robustness and minimal sagging over time.
While it does not have a flippable design, its medium density and quick memory foam recovery time of 0.9 seconds ensure that the mattress contours closely but rebounds swiftly. This feature highlights a good balance between support and comfort, maintaining ergonomic spinal alignment for various sleeping styles.
Temperature Regulation
Thanks to a combination of gel-infused foams and a breathable Tencel cover, the mattress features temperature regulation that is rated excellent in heat dissipation. The moisture-wicking fabric component contributes further to keeping sleepers fresh, which is often a challenge with traditional memory foam units.
Extra Features
The mattress supports adjustable bases and head and foot elevation, increasing its suitability for those wanting versatile sleep/custom rest positions. Though it doesn't offer dual firmness or modular layers, the built-in motion isolation rate of 9 indicates it's well-suited for couples and reduces disturbances effectively.
Pros & Cons
Pros
- Long 20-year warranty demonstrating durability confidence
- Excellent temperature regulation with gel-infused memory foam and Tencel cover
- High motion isolation rating, ideal for couples
- Eco-friendly certifications, including CertiPUR-US and GREENGUARD Gold
Cons
- No removable or washable cover, which can impact maintenance
- Lacks customizable firmness or dual-firmness options
- No bed bug resistance, which could concern some buyers
Price & Value for Money
Priced at $734.3 at BedInABox.com, the Tranquillium presents a competitive offering given its 20-year warranty period and multiple layers of cooling and comfort technology. When compared to similar medium-profile memory foam mattresses, the inclusion of eco-certifications and a generous trial period enhances its appeal. This mattress is likely a good value for sleepers prioritizing temperature regulation, couple-friendly design, and long-term durability, though those seeking extensive customization might look elsewhere.
Quick Take
In short, the BedInABox Tranquillium offers medium firmness memory foam comfort combined with excellent cooling properties and a solid build backed by extensive warranty coverage. Its strong motion isolation and couple-friendly features make it a compelling choice for shared sleeping spaces. If we look at the numbers alone, it balances eco-conscious production with practical home use well.
Closing Recommendation
The Tranquillium may be ideal for individuals and couples who want a balance between softness and support without the fuss of adjusting firmness levels. It appears to perform best for sleepers seeking temperature control, pressure relief, and environmentally certified materials in a mattress that promises longevity. While lacking in modular or customizable options, it helps users achieve restful, cool nights backed by strong confidence in quality and safety.
Verdict
Rating: Based on the specifications and overall feature set, we believe BedInABox Tranquillium deserves 4.3 out of 5.
- Winner Feature => Outstanding temperature regulation combined with certified eco-friendly materials.
- Needs Improvement => Limited cover maintenance options and lack of firmness customization.
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