Bunk bed extras: mattresses, tents and add-on rails
Buy the mattress to the mark on the frame. A fabric canopy is not a guard rail and it uses headroom. A toddler bed rail is for a floor-level bed, not a repair for a top bunk.
The mattress
Match length, width and depth. The OYT listing is 90 × 190 × 15 cm. That is a standard UK single in plan, at a depth that suits some marks and not others. The Jupiter listing’s maximum is 18 cm, with the mattress top kept at least 16 cm below the guardrail. If your mark is under 15 cm, this mattress is too thick for the top. We have not tested it.
A canopy
The Snuggy Pod single listing gives the canopy as 190 × 90 × 110 cm, for a standard single frame rather than a divan, and it mentions bunk beds as one place people use it. One hundred and ten centimetres of fabric above the mattress is a headroom problem on an upper bed, and the fabric can lean on the guard rail. It is a cover, not a barrier. Prefer it on a lower bed or a floor-level single unless you have measured the gap.
Rails and boxes that do not belong on the top bunk
Toddler bed rails sold for 18 months to 5 years are for the move out of a cot. They are not a way to raise a bunk barrier, and that age group should not be on an upper bed that carries the under-six warning. Under-bed boxes are fine if they slide in the gap you measured. They are not fine if they stop the ladder or a drawer.
Published examples
OYT single mattress, 90 × 190 × 15 cm
A rolled foam single mattress listed at 15 cm thick. A top bunk whose marked maximum mattress thickness is at least 15 cm. If the mark is lower, do not use it on top.
- The listing’s size is 90 × 190 × 15 cm (3 ft × 6 ft 3 in).
- The construction line says 2 cm memory foam over 13 cm of support foam.
- Depth on a listing is not the maximum your frame allows. The mark on the bed wins.
We haven’t tested this product. Dimensions and limits are as the maker’s listing states them (checked 13 November 2026).
Snuggy Pod single bed canopy
A pop-up fabric canopy for a standard single bed. A lower bunk or a floor-level single, if the ceiling and the guard rail still have room.
- The listing’s item size is 190 × 90 × 110 cm.
- The listing says it is for standard single bed frames, not divan beds, and mentions bunk beds among the places it can be used.
- A 110 cm canopy on an upper bed uses the headroom you measured and can sit against the guard rail. Measure before you buy.
We haven’t tested this product. Dimensions and limits are as the maker’s listing states them (checked 13 November 2026).
Julian Bowen Jupiter midsleeper
A mid sleeper with a pull-out desk, shelves and drawers, lower than a full bunk. A room that needs a desk underneath and has less ceiling height than a standard bunk.
- The listing’s dimensions bullet says H 138 × W 196 × D 135 cm, net weight 126.5 kg, mattress 90 × 190 cm.
- The same listing says the top of the mattress must be at least 16 cm below the lowest part of the guardrail, and that the maximum mattress height is 18 cm.
- A product-dimensions row on the listing shows 53.1 × 77.2 × 54.3 cm, which is not a bed. Ignore that row and use the maker’s sheet.
We haven’t tested this product. Dimensions and limits are as the maker’s listing states them (checked 13 November 2026).
Questions people ask
Will a tent hold a child on the mattress?
No. A fabric canopy is not a safety barrier. The guard rail and the mattress mark still do that job.
Should I buy the mattress from the same listing as the frame?
Only if its depth is within the mark. A bundle that hides the mattress depth is the one to avoid.
Sources
Opened 13 November 2026. The maker’s sheet and the mark on the bed take precedence.