If you've ever woken up in the middle of the night and couldn't get comfortable, it's time to ditch your old mattress. The Relyon Memory Plus 1800 Pocket Mattress is rated firm, and with 1000 full-size pocket springs and a further 800 mini springs under the foam I'd say it's aimed at people who want that firmer, more supportive vibe rather than a soft, sink-in feel. With this Relyon Memory Plus 1800 Pocket Mattress, you'll be able to get comfortable in no time at all, and with enhanced orthopaedic support you'll find additional pressure relief helping with unwanted aches and pains.
The Relyon Memory Plus 1800 Pocket Mattress is designed to reduce pressure points and provide a comfortable night's sleep. The cover is a soft-touch knit that's only micro-quilted, so the comfort is coming from the memory foam underneath rather than any big, plush quilting. That foam is a 4.5cm layer, enough for the slow, moulding response memory foam is known for, but over a firm spring unit I wouldn't expect you to get swallowed up by it. The memory foam comfort layer provides pressure relief that rebounds while the pocket sprung support layer provides a firm tension for those who need a little bit more support than average. For back sleepers, a firm unit of individually pocketed springs should keep your hips held up rather than letting them sag, which is what you want if your lower back tends to complain. Side sleeping is where I'd be more wary, because 4.5cm of foam over a firm tension doesn't leave a shoulder much to sink into, so if you're a lighter side sleeper this firmness could come across as a touch too hard. One owner calls it a "nice firm bed all round" and another says it's "not comfortable at all", which is the split I'd expect from a tension this firm. The mattress is 31cm deep, which is perfect for most beds and bed frames, but do double check your fitted sheets because that extra depth can be a pain if you're used to standard 25cm-ish mattresses.
This mattress is perfect for back and stomach sleepers and the listing now shows it in King Size only. Just be aware that memory foam can sleep a bit warmer than a straight spring mattress, and 31cm of mattress isn't the easiest thing to wrestle on your own, though it does have turning handles stitched into the border.
How we reviewed the Relyon Memory Plus 1800 Pocket Mattress
10+ years in the mattress industry43-point spec checkBenchmarked against 345 pocket-sprung mattresses7 buyer questions read636 price checks since Feb 2020
Drawing on over 10 years in the mattress industry, our team judged the construction, materials and firmness of the Relyon Memory Plus 1800 Pocket Mattress point by point from its 43-point specification and Mattress Online's listing, and benchmarked it against 345 other pocket-sprung mattresses we track. We have checked its price 636 times since February 2020. How we review
Corrections
When we get something wrong, we fix it and say so here. All corrections
- 11 October 2026
- We said this mattress came in all typical sizes under the Slumberland name. The listing now shows it as the Relyon Memory Plus 1800 Pocket Mattress, in King Size only.