Firmness
Type
Open Coil Spring
Depth (cm)
16
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
5
Price Range
£125
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
If you're kitting out a bunk bed, this is a straightforward choice. The 16cm depth keeps the sleeping surface below the safety rail, and the medium to firm feel gives a growing child proper spinal support rather than letting them sink in. The e-Fibre construction is hypoallergenic, helpful if your child has allergies, and the whole thing is handcrafted in the UK by a National Bed Federation approved brand. MattressOnline, currently the listing retailer, offers a 100-night trial and a 5-year guarantee on it, along with free delivery to most of mainland England, Scotland, Wales and Northern Ireland with a two-hour delivery slot. It's a simple build, but at £125 it doesn't need to be anything more.
Key Features & what's inside
- Cover. A knitted cover with a soft finish that adds cosiness and warmth. It's designed to enhance airflow and breathability, so it shouldn't trap heat around a sleeping child.
- Comfort Layer. Soft white fibre fillings create a cosy feel directly under the cover. They're durable and resilient, which means the mattress should hold its shape rather than flattening quickly.
- Support Layer. An e-Fibre base and support layer that work together to create full body support. This sits between the comfort fillings and the springs to keep the feel consistent.
- Core. Traditional open coil springs, interlaced and joined in a lattice design. That lattice distributes weight evenly across the surface, which suits lighter bodies well.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
This is a children's mattress, so it's not built for adults or heavier teenagers who need deeper support layers. If your child prefers a soft, sink-in feel, the medium to firm tension may feel a little unyielding. And it comes in UK single only, so it won't suit other bed sizes.
Jay-Be Sleep Smart e-Sprung Childrens Bunk Mattress
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Is the Jay-Be Sleep Smart e-Sprung suitable for bunk beds?
Yes, it's designed specifically as a bunk mattress. Its 16cm depth is the key detail: a slimmer mattress keeps the sleeping surface lower relative to the top bunk's guard rail. Check your bunk bed's maximum mattress depth to be sure, but 16cm suits most frames.
How firm is the Jay-Be Sleep Smart e-Sprung children's mattress?
It's listed as medium to firm. That's a sensible tension for children, offering enough support for a growing spine without being board-hard, thanks to the soft white fibre comfort fillings above the open coil springs.
Does the Jay-Be Sleep Smart e-Sprung come with a trial and guarantee?
MattressOnline, the retailer currently listing it, offers a 100-night trial and a 5-year guarantee. These are the retailer's own terms rather than a manufacturer promise, so if you buy elsewhere, check what that shop offers before ordering.
Is the Jay-Be Sleep Smart e-Sprung hypoallergenic?
Yes. It's certified hypoallergenic, and its e-Fibre construction is a reasonable pick if your child suffers from allergies. It's also fire resistant, conforming to BS7177: 2008 for home use, and made by a National Bed Federation approved brand.
What sizes does the Jay-Be Sleep Smart e-Sprung come in?
It's available in UK single only, priced at £125. That fits standard bunk beds and single bed frames, but there's no small single or European sizing, so measure your frame before buying.
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