BedInABox Tranquillium Mattress

The Tranquillium is classified as a firm mattress. It is designed to provide a stable, supportive surface that keeps your body aligned rather than allowing you to sink deeply into the foam.

The mattress is engineered to mitigate heat retention through its CoolRest® gel-infused memory foam layer and a breathable Tencel cover. These materials work together to dissipate body heat and promote airflow throughout the night.

Yes, the Tranquillium is fully compatible with adjustable bed bases. Its multilayer foam construction is flexible enough to contour to the movements of an adjustable frame without compromising support.

Yes, all foams used in the Tranquillium are CertiPUR-US® certified. This means they are made without ozone depleters, mercury, lead, or other heavy metals and have low VOC emissions for indoor air quality.

Because of its firm, supportive construction, the Tranquillium is suitable for all sleeping positions, including back, side, stomach, and combination sleepers. It provides the necessary spinal alignment regardless of how you prefer to rest.

The 20-year warranty covers manufacturing defects such as physical flaws in the foam that cause it to split or crack, as well as permanent indentations greater than a specific depth under normal use. It does not cover normal increases in softness or comfort preferences.