Glossary

Mattress specs are full of jargon, from spring counts to foam density. Knowing what the terms mean makes it easier to compare two mattresses and see what actually differs.

Base Layer

The foundational layer that supports the comfort layers.

Breathability

The ability of a mattress to allow air circulation.

Certifications

Certifications verifying the quality and safety of materials.

Coil Count

The number of coils in an innerspring mattress.

Durability

The longevity and lifespan of a mattress.

Edge Support

The strength of a mattress's edges to support weight without collapsing.

Euro Top

A mattress with an additional layer of padding sewn into the top.

Foam Density

The mass per unit volume of foam used in mattresses.

Foundation

A solid or slatted structure to support a mattress.

Gauge

The thickness of the wire used in mattress coils.

Hypoallergenic

Materials or treatments used to prevent allergic reactions.

Microcoils

Small, individually wrapped coils used in the comfort layers of some mattresses for added support and comfort.

Motion Isolation

The ability of a mattress to absorb motion and prevent it from transferring across the bed.

Off-Gassing

The release of volatile organic compounds (VOCs) from a new mattress.

Open-Cell Foam

Foam with an open-cell structure to enhance airflow.

Organic

Made from materials grown without pesticides and chemicals.

Phase Change Material

Materials used to absorb and dissipate heat.

Pressure Relief

The ability of a mattress to alleviate pressure points on the body.

Refunds

The money returned to a customer after a return.

Sagging

The tendency of a mattress to lose its shape and support over time.

Sleep Trial

A period during which a customer can try a mattress before committing.

Spinal Alignment

The alignment of the spine while lying down.

Thickness

The height or depth of a mattress.

Tufting

The method of securing layers of fabric with threads or yarns.

Warranty

A guarantee provided by the manufacturer against defects.

Zoned Support

Specific areas of a mattress designed to provide targeted support.