Warmth in a cat bed comes from trapping the cat's own heat, not from generating any of its own. That is why a padded, roofed bed outperforms a thicker open one in a cold room: the walls hold warm air in place around the animal instead of letting it rise straight off into the ceiling. On a frosty night in an unheated back bedroom, that is a difference a cat will notice and act on.

This one is built as a house, with padded insulated walls, a soft cushioned base to sleep on, and a roof that keeps draughts off the back of the neck. The roof comes off, and that is the part deciding whether a bed like this stays usable, because a covered bed you cannot open is a covered bed you cannot clean properly. It is light enough to move to wherever the sun happens to be.

• Enclosed house shape with a padded, insulated shell
• Removable roof for cleaning
• Thickened plush interior over a cushioned base
• Holds body heat rather than producing any
• Two sizes, M and XL
• Light enough to move between rooms

Two things worth knowing. And nothing here is self-heating, whatever that word gets used to mean elsewhere. The warmth is your cat's own, held in.

Who it's for: Cats who burrow, kittens and older cats who feel the cold, and anyone whose cat has taken to sleeping in a cardboard box.