Available 
Jay-Be QUEST Q1 Deep e-Spring Childrens Mattress
from £149.
£149
Sizes tracked: Single
Jay-Be Kids Mattress
Jay-Be Simply Kids Waterproof Mattress review
Jay-Be Simply Kids Waterproof Mattress is a budget-leaning single kids mattress at £124, with open-coil support and easy-clean practicality for bedrooms or guest rooms.
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Last verified: 2026-07-21
Quick verdict
Jay-Be Simply Kids Waterproof Mattress is a practical single kids mattress at £124, and that price sits below the current comparable median. It stands out more for waterproof, easy-clean convenience and a medium to firm feel than for luxury comfort extras, so it suits shoppers who want a straightforward buy for a child’s bedroom or a spare room. Check the latest price and availability on Mattress Online before ordering.
Available sizes and prices
Jay-Be Simply Kids Waterproof Mattress is listed with 1 size option from £114. The visible sizes include Single, so use the table to compare the option that matches the exact size, colour, format or specification you want. Always confirm the final checkout price, delivery charge and stock status on the retailer page.
| Size | Firmness | Price | Stock | Last checked | Link |
|---|---|---|---|---|---|
| Single | Check retailer | £114 | In stock | 2026-07-21 | View |
Key product details
These are the retailer details worth checking first for Jay-Be Simply Kids Waterproof Mattress: Brand: Jay-Be; Type: Kids Mattress; Sizes tracked: Single; Price range: £114. Treat them as a quick fact sheet, then use the retailer page to verify any installation, warranty, delivery or model-number details before buying.
| Brand | Jay-Be |
|---|---|
| Type | Kids Mattress |
| Sizes tracked | Single |
| Price range | £114 |
| Owner rating signal | 4.0 out of 5 shown; review volume needs checking with the retailer |
| Last checked | 2026-07-21 |
What the retailer page says
The Mattress Online listing points to a traditional open-coil spring support system, Soft White Fibres comfort layers and a medium to firm firmness rating. It also advertises a 100-night comfort trial, a 5-year guarantee and handcrafted-in-the-UK build notes, which are notable extras at this price. The retailer meta description also highlights allergen and bacteria protection, recycled materials and easy cleaning, but shoppers should treat those as product-page claims to verify rather than independent proof.
What the wider comparison shows
In the current comparison set, £124 sits below the median peer price of £149, so this is priced as a budget-leaning kids mattress rather than a premium model. There is only 1 tracked variant, which means choice is limited and the main decision is whether the single size and feature set fit your child’s bed or guest-room setup. The displayed 4.0/5 rating comes from just 1 visible review, so it should be read as a weak signal rather than strong confirmation of owner satisfaction.
Buyer trade-offs to weigh
The main advantage here is practicality: waterproof and easy-clean positioning makes sense for children’s rooms, occasional spill risk and simple guest-room use. The trade-off is limited range, because this listing only confirms the single size, so buyers who need more than one size option or a different feel may want to compare alternatives before checkout. Also check the final delivery price, postcode coverage and stock at Mattress Online, because a low sticker price only stays attractive if the total cost remains close to £124.
Price and value benchmark
At £124, Jay-Be Simply Kids Waterproof Mattress is cheaper than the median comparable price of £149, which gives it a clear value edge on sticker price alone. That does not automatically make it the best fit, though: the value case is strongest if you want a simple kids mattress with open-coil support, medium to firm feel and trial/guarantee cover. If you are comparing similarly priced kids mattresses, use the extra money saved to judge whether another model offers more size choice or a clearer review trail.
How it compares with nearby alternatives
A useful comparison point is Jay-Be QUEST Q1 Deep e-Spring Childrens Mattress, which sits £25 higher in the current set. That difference matters because it suggests the Simply Kids model is the more budget-conscious option, while the QUEST range may be worth checking if you want to compare Jay-Be’s children’s line against a deeper or differently specified mattress. The right choice comes down to whether you value the lower price at £124 or would pay more for a different Jay-Be spec and any extra size or construction details.
How to read the review evidence
The listed score is 4.0 out of 5, but it is based on only 1 visible review on the retailer page. That is too thin to count as a strong buying signal, so it is better to treat the rating as a small hint rather than proof that the mattress will suit every child or household. If review confidence matters to you, look for a fuller owner-review count before relying on the star average.
Who it suits
This Jay-Be kids mattress looks best for shoppers buying for children’s bedrooms or a guest room where practicality matters more than plush comfort. At £124, the single-size listing leans toward a straightforward, budget-conscious purchase, and the open-coil springs plus Soft White Fibres comfort layer make it a sensible shortlist candidate for parents who want a no-fuss mattress rather than a luxury feel. It is also worth a look if you want trial and guarantee cover without moving into a much higher price band.
Who should avoid it
Skip this Jay-Be Simply Kids Waterproof Mattress if you need more size choice, because the tracked listing only confirms a single size and does not suggest a broad range. You should also look elsewhere if you want a softer or more cushioning feel, since the medium to firm rating leans toward supportive simplicity rather than a softer comfort-led build. Buyers who want stronger review evidence should compare other children’s mattresses with more than 1 visible review on the retailer page.
Comfort and support
The open-coil spring system and medium to firm firmness point to a mattress that should feel more supportive and straightforward than sink-in soft. With Soft White Fibres used as the comfort layer, the feel is aimed at everyday child use rather than premium contouring, so it may suit families who want a steadier surface for a kids bed at £124. That said, the retailer description should be treated as product positioning, not a promise of pain relief or any medical outcome.
Value check
For £124, the value story is strongest when you want a practical kids mattress with open-coil support, waterproof/easy-clean positioning, a 100-night comfort trial and a 5-year guarantee. Those extras make the listing feel more confident than the price alone might suggest, especially for a basic children’s bed or spare room. The main reason to hesitate is not the price, but the narrow size choice and very thin review volume.
Good alternatives to compare
The closest alternatives to compare with Jay-Be Simply Kids Waterproof Mattress include Jay-Be QUEST Q1 Deep e-Spring Childrens Mattress, Jay-Be Bio Cool Hybrid 2000 e-Pocket Mattress, Jay-Be QUEST Q2 Deep e-Pocket Childrens Mattress. Use these cards to check whether a nearby model gives you a better price, a more suitable specification or a clearer match for your space and budget.
Available 
Jay-Be Bio Cool Hybrid 2000 e-Pocket Mattress
from £264-£474.
£264-£474
Sizes tracked: Single, Small Double, Double, King Size
Available 
Jay-Be QUEST Q2 Deep e-Pocket Childrens Mattress
from £154.
£154
Sizes tracked: Single
Retailer details used
Last checked 2026-07-21. The source list below is included to help you check the details behind the comparison. Always confirm the latest price, delivery cost, stock status and product details with the retailer before buying.
More mattresses to compare
These related guides and reviews can help you compare nearby options before buying.
Questions about this mattress
Is Jay-Be Simply Kids Waterproof Mattress worth considering at £124?
Yes, if you want a practical kids mattress with open-coil support, a medium to firm feel and easy-clean positioning. The £124 price is below the current median comparable price of £149, so it has a useful value edge, but you should still check delivery, stock and the final checkout total on Mattress Online.
Does the single size limit make this a risky buy?
It can, depending on your needs. The tracked listing confirms only one size, so this is a better fit if you already know you want a single mattress. If you need another size or a wider choice of firmness and depth, compare alternatives before ordering.
How strong is the 4.0/5 rating if only one review is visible?
It is a very weak buying signal. A 4.0/5 score from just 1 visible review does not show a broad owner consensus, so it should not outweigh the product details, price and trial/guarantee terms.
What does the medium-firm open-coil construction mean in practical terms?
It usually points to a more supportive, straightforward feel rather than a soft, sink-in surface. For a child’s bed, that can be a sensible fit if you want simple support and easy upkeep, but shoppers who prefer a plusher comfort layer should compare other mattresses.
What should I check before buying on Mattress Online?
Check the latest price, stock, delivery timing and whether the single size is the right fit for your bed frame and bedding. It is also sensible to confirm the depth, because mattress depth affects compatibility with toppers, sheets and some bed frames.