Bio Pillow Top Topper, 6 cm

6 cm, give or take a centimetre. Measure from your slats to the top of the side rail: a mattress much deeper than the surround loses the edge support the frame was giving it.

Shallow enough for bunk beds, cabin beds and frames with a low surround, where a safety rail has to stand clear of the sleeping surface.

Small single, Single, Small double, Double, King, Super king, Emperor.

If none of those fit, we cut this build to any size in our own factory — see made to measure.

Yes, provided the slats are no more than 7 cm apart. Wider gaps let the mattress settle into them over time, and that is excluded from the guarantee. On a solid platform, stand the mattress on its side for an hour a few times a year so the underside can dry out.

No — it is a no-turn build. Rotate it head to foot every three months for the first year, then twice a year after that.

Yes. BS 7177 Low Hazard, under the Furniture and Furnishings (Fire) (Safety) Regulations 1988, with a permanent Schedule 7 label sewn into the border.

24 to 72 hours with a window open. It is the foam off-gassing and it is harmless. It is strongest on a rolled mattress in the first hour after unwrapping.

Free, tracked, one-person parcel delivery on rolled sizes. Deeper and hand-tufted builds ship flat on a two-person service and we book a slot with you.

Yes — add old mattress removal to the order and the driver collects it on delivery. It goes to a licensed recycler, not to landfill.