Mattress Tension Guide

Understand the feel behind the label

Tension is commonly used to describe firmness, but the label does not replace the full construction. Memory Foam Mattress (Body Contour) provides a foam-base comparison with Memory Foam 1000 Pocket Spring Mattress. The latex and gel pillow-top designs show how another material or surface section changes the specification again. These examples make the terminology concrete: a mattress can be described by feel, filling, core and finish at the same time. The purpose of the guide is to explain those differences so that a preferred feel can be explored through the relevant mattress choices.

Explore the range

Comfort layers and the support underneath

A mattress is a complete construction rather than a single filling. The upper layers create much of the first impression when you settle onto the surface, while the core provides the structure beneath them. Memory foam, latex and gel-labelled constructions offer different material routes; pocket springs and foam bases are different approaches to the core. That distinction makes it easier to compare mattresses with similar names. A pillow-top or quilted finish describes another part of the design, so it can sit alongside a material name rather than replacing it.

A feel that matches your preference

Soft, medium and firm describe a mattress feel, not a universal measurement shared by every construction. Surface cushioning and the response underneath contribute together, and the experience also depends on the person using the mattress. A softly cushioned top and a substantial underlying structure can be parts of the same design. Equally, a higher spring count does not by itself tell you whether a mattress will feel firmer. The useful comparison brings together the stated feel, the comfort layer and the core rather than choosing on one number.

Spring counts in context

Pocket-sprung mattresses use individually enclosed springs as part of their construction. The advertised count is a specification detail rather than a league table of comfort. Counts may be based on a particular mattress size and may describe more than one spring layer. Materials above the springs, the spring design and the complete mattress construction also matter. This is why a material-led comparison can be more informative than moving straight to the highest number: two models can share a count and still offer quite different surface constructions.

Surface finish and bedroom setup

A pillow top adds a distinct upholstered section at the sleeping surface, while quilting joins the covering and surface layers in a stitched pattern. Neither finish fixes the firmness of the complete mattress. Depth is another separate choice: together with the base height it affects how high the finished sleeping surface sits, and it determines the depth of fitted bedding needed. These practical details help a mattress become part of a comfortable bedroom arrangement rather than an isolated purchase based only on the filling name.

UK mattress sizes

Our size options use standard UK mattress dimensions. Small Single through Double share a 190cm length, while King and Super King offer a 200cm length. Width increases across the range, so the difference between sizes is about both sleeping space and the room around the bed.

These measurements describe the mattress. A bed frame, upholstered base or headboard can extend beyond the sleeping surface. Mattress depth is a separate measurement that contributes to the finished bed height; the product guides keep these dimensions distinct.

Your questions answered

What does tension mean on a mattress?

It is commonly used as a firmness description. The term helps organise comfort preferences, but material layers and the core explain the construction behind that feel.

Does a higher spring count mean a firmer mattress?

Not necessarily. Firmness depends on the full construction, including the spring design and the layers above it. A spring count is useful specification information, but it is not a firmness rating.

Is every pillow-top mattress soft?

Pillow top describes a separate section at the surface. The overall feel also comes from the filling and support beneath it, so the finish alone does not establish a soft, medium or firm rating.

Does mattress depth change its UK size?

Depth is separate from width and length. A standard UK size describes the sleeping area; the mattress depth changes the finished height on the base and the fitted-sheet depth required.