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Written by Mike B Mattress Toppers 8 min read

Reflex Foam Mattress Toppers: Medium or Firm?

Compare Reflex Superior Medium and Reflex Superior Firm mattress toppers by feel, recovery, mattress condition and intended use.

A Reflex foam topper is for customers who want a resilient surface that returns more quickly after pressure than memory foam. The All Foam mattress toppers range includes Reflex Superior Medium and Reflex Superior Firm, both at 5cm thick and available in standard bed sizes.

The choice is not between good and better. It is between a more forgiving medium response and a firmer, more resistant surface. The mattress underneath still controls much of the final feel, so the starting bed must be assessed before either topper is selected.

What Reflex foam feels like

Reflex foam compresses under the body and then recovers promptly as pressure changes. It feels more immediate than memory foam, which responds more slowly and creates a closer contour.

This quicker recovery can make turning and changing position feel easier. It can also suit customers who prefer to feel supported on the surface rather than closely enveloped by it.

Both All Foam Reflex toppers share this responsive character. Their difference is firmness.

Reflex Superior Medium

Reflex Superior Medium provides the softer of the two Reflex choices. It creates a resilient 5cm comfort layer with a medium, luxurious feel.

This option can suit a sound mattress that feels too firm or too flat at the surface. It adds cushioning without introducing the slow response associated with memory foam.

The original mattress remains part of the result. On a high firm mattress, Reflex Medium may create a balanced medium surface. On a soft mattress, it may feel more yielding than intended.

Reflex Superior Firm

Reflex Superior Firm provides greater resistance at the same 5cm depth. It retains quick recovery but feels more stable and firm under load.

This option can suit a customer who wants a distinct topper layer without making the bed softer. It may also suit a medium mattress where a firmer upper response is preferred.

A firm topper does not rebuild a worn mattress. If the bed has a dip or failed edge, the topper will follow that shape.

Use the current mattress as the reference point

The most useful question is: what change should the topper make?

If the mattress is even but feels too hard, Reflex Medium is the natural first comparison. If the mattress is even but feels too soft or lacks surface resistance, Reflex Firm may be more appropriate.

If the mattress already feels close to correct, adding 5cm can create more change than expected. A topper should solve a defined surface problem, not be added simply because the bed is old.

Pairing Reflex Medium with different mattresses

Reflex Medium over a firm mattress can soften the first contact while preserving the stable base beneath it. This is one of the clearest uses for the product.

Over a medium mattress, it can create a more cushioned overall feel. This may suit customers who deliberately want more give, but it could feel too soft for someone who prefers a flatter surface.

Over a mattress that is already soft, the result may become deeper and less stable. Check the original mattress before ordering.

Pairing Reflex Firm with different mattresses

Reflex Firm over a medium mattress can create a firmer and more responsive upper layer. It changes the surface without replacing the support core.

Over a firm mattress, it produces a consistently firm result. This can suit customers who strongly prefer resistance, but it will not add much softness.

Over a sagging mattress, it is not a solution. The firmer foam can still bend into the low area because the failed support remains underneath.

Body weight changes the response

A lighter person may compress less of the 5cm topper and feel more of its stated firmness. Reflex Firm can therefore feel very resistant, while Reflex Medium may still feel quite supportive.

A heavier person normally engages more of the topper depth and may feel the mattress below more clearly. The same Reflex Medium topper can feel balanced to one person and too soft to another.

There is no fixed weight chart that replaces personal preference. Use the existing mattress as a reference and choose the direction of change first.

Sleeping position can guide the shortlist

A side sleeper may begin with Reflex Medium where more shoulder and hip cushioning is wanted. A back sleeper or customer who prefers a flatter surface may begin with Reflex Firm.

A person who changes position frequently may appreciate the quick recovery of either grade. The medium version allows more initial give, while the firm version resists compression more strongly.

These are starting points. The mattress beneath and the sleeper's body profile still influence the result.

Guest beds and occasional use

A guest bed must accommodate different users. Reflex Medium can provide a generally forgiving surface where the mattress underneath is firm and sound.

Reflex Firm can suit a guest mattress that feels too soft or needs a more stable upper layer. However, a topper should not be used to extend the life of a structurally failed bed.

For occasional use, consider storage and ventilation as well as feel. Keep the topper flat, dry and protected when not in use.

Shared beds need one firmness choice

A standard topper covers the whole mattress, so both partners use the same response.

If one person wants the bed softer and the other wants it firmer, neither Reflex option can create two separate zones. The decision should focus on the most important shared problem.

Reflex Medium may provide a compromise where the current bed is clearly too firm for both. Reflex Firm may suit both where the mattress feels too yielding. If preferences are opposite, a single topper may not be the right solution.

Reflex and memory foam are different decisions

Memory foam responds slowly and contours closely. Reflex foam returns more quickly and feels more immediate.

A customer who enjoys settling into the surface may prefer memory foam. A customer who wants easier movement and quicker recovery may prefer Reflex.

Once Reflex has been chosen as the material, the remaining decision is medium or firm. Do not compare the two grades as if one is a substitute for a 7cm memory foam topper, because the response and available depths are different.

Reflex and standard polyurethane foam

All Foam also sells Medium Density and High Density foam toppers at 5cm. These provide straightforward softer or firmer polyurethane foam options.

Reflex Superior Medium and Firm are positioned as more resilient choices with quicker recovery. Customers comparing the range should consider response, not only firmness wording.

A standard foam topper may suit a simple budget led comfort change. A Reflex topper may suit a customer who specifically wants the resilient feel and recovery characteristics of the material.

Measure before ordering

The Reflex toppers are available in Single, Double, King Size and Super King. Check the exact dimensions shown on the live product card and measure the mattress itself.

Do not rely only on the bed frame name. Older and imported mattresses can differ from current UK dimensions.

The topper should sit evenly without a large overhang or exposed border. A correct fit also helps the fitted sheet hold the complete sleeping surface.

Allow for the extra 5cm

Both Reflex toppers add 5cm to the bed height. Add this to the current mattress depth before ordering.

Check fitted sheets, protectors, headboard position and ease of getting into bed. A suitable firmness can still be impractical if the finished bed becomes too high.

The same 5cm depth means the practical height change is identical for Medium and Firm. The decision can therefore focus on feel once the size and bedding checks are complete.

Care and fitting

Place the topper on a clean, dry and supported mattress. Align the edges and use suitable bedding to hold the layers together.

Do not glue the topper to the mattress. If movement occurs, check the size match, mattress cover and fitted sheet tension.

Keep the foam away from direct heat, moisture and harsh cleaning products. Follow the supplied care information.

Signs the mattress should be replaced instead

Do not use either Reflex topper to hide:

  • a deep visible dip
  • broken or collapsed edges
  • failed springs or foam
  • an uneven bed base
  • a mattress that has lost support across a large area
  • repeated rolling into one low section

A topper changes surface feel. It does not create a new support system.

A practical buying comparison

Choose Reflex Superior Medium when the sound mattress feels too firm and a resilient softer layer is wanted.

Choose Reflex Superior Firm when the sound mattress feels too soft or when a firmer quick recovery surface is preferred.

Choose neither until the mattress and base have been checked. If the original support has failed, a new mattress is usually the more appropriate route.

Questions to answer

Before ordering, confirm:

  • is the mattress level and supportive?
  • should the surface become softer or firmer?
  • is quick recovery preferred to slow contouring?
  • how does the current mattress feel under body weight?
  • does the sleeper change position often?
  • do both partners want the same change?
  • what are the exact mattress dimensions?
  • will existing bedding fit an extra 5cm?

Final guidance

Reflex Superior Medium and Reflex Superior Firm have the same depth and the same quick recovery material character. Medium provides more initial cushioning. Firm provides greater resistance and a steadier upper feel.

Use the current mattress to choose the direction of change. Select Medium to soften a sound firm surface, or Firm to add resistance to a sound medium surface.

The right Reflex foam mattress topper is the one that makes a specific, measured adjustment without being asked to repair a mattress underneath.