Jay Be Benchmark S1 Comfort Eco Friendly Mattress

Assessed from the product page published by Mattress Man, captured September 2026, and from regular price comparison across our UK retail partners.

The main reason to choose this mattress is value. You get a hybrid construction, meaning springs paired with comfort layers, which usually gives better airflow and edge stability than foam alone at a similar price. The firm rating suits back and front sleepers who want a supportive, no-sink surface, and heavier sleepers who tend to find softer budget mattresses give way too quickly. At 18cm deep it works well on bunk beds, guest beds and daybeds where a thicker mattress would sit awkwardly. It's a simple product rather than a feature-packed one, but at an affordable starting price, simple and supportive is a fair trade.

Budget buyers
The copy calls this an affordable, good value mattress, so it suits anyone wanting a straightforward firm feel without spending much.

Back sleepers
The firm rating gives a supportive, no-sink surface, which means your body stays level rather than dipping into the mattress.

Front sleepers
Firm support keeps the surface from sagging under your middle, so you lie flatter instead of sinking in as you might on a softer budget mattress.

Heavier sleepers
Softer budget mattresses tend to give way too quickly under more weight, whereas this firm hybrid with springs and comfort layers resists that sinking.

Bunk beds
At 18cm deep, it fits bunk beds without sitting awkwardly, which a thicker mattress often does.

Lightweight side sleepers may find a firm mattress presses uncomfortably on the shoulder and hip. If you like a plush, cushioned feel or a deep, hotel-style profile, the 18cm depth and firm rating won't deliver that. Anyone wanting detailed spec transparency before buying should look elsewhere, as published construction details are thin.

How firm is the jay be benchmark s1 comfort mattress?

It's rated firm, which means minimal sink and a supportive, flatter sleeping surface. That tends to suit back and front sleepers, although lightweight side sleepers may find it a little too unyielding.

What sizes does the jay be benchmark s1 come in?

It's available in UK Single, Small Double, Double and King.

How thick is the jay be benchmark s1 mattress?

It's 18cm deep, which is shallower than many hybrids. That makes it a practical fit for bunk beds, guest beds and daybeds, though it won't give you a deep, plush profile.

Is the jay be benchmark s1 a spring or foam mattress?

It's a hybrid, so it combines springs with comfort layers. In practice that usually means better airflow and a more stable feel than an all-foam mattress at a similar price.