Firmness
Firm
Type
Hybrid
Depth (cm)
18
Number of Layers
Trial Period (nights)
Warranty (years)
Price Range
£149 to £199
Best Sleeping Position(s)
Certifications
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. From £149, you get a hybrid construction, meaning springs paired with comfort layers, which usually gives better airflow and edge stability than foam alone at this 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 this money, simple and supportive is a fair trade.
Key Features & what's inside
Awaiting up to date specifications. Please check back later.
Who's it NOT for?
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.
Jay Be Benchmark S1 Comfort Eco Friendly Mattress
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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, with prices ranging from £149 to £199 depending on the size you choose.
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.
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