Hairless cats are not simply cold cats; they are cats without the layer that normally regulates them, and they will find the one warm spot in a house and stay there rather than moving about. A close-fitting knit gives that layer back, which in practice means a Sphynx who leaves the radiator and behaves like a cat again once the heating goes off in the evening.

The roll-neck matters more than it looks. Heat leaves fastest at the neck and chest, so a collar that folds over covers the exact area a flat-necked jumper leaves open, and the turned cuffs do the same job at the legs. The knit is chunky but stretchy, so it holds shape without gripping, and the whole garment weighs between 63g and 112g depending on size, which is light enough that a cat stops noticing it within a minute or two.

• Chunky knit with a fold-over roll-neck collar
• Turned cuffs at the legs to hold warmth in
• Stretchy throughout for a close fit without tightness
• Weighs 63g to 112g depending on size
• Two colours: brown or light brown
• Six sizes from XS to XXL, cut for slim and hairless builds

Two things worth knowing. Knitwear against bare skin can chafe at the armpits, so check under the front legs after the first hour and take it off if you see redness. Loose loops are also a snagging risk for claws, so trim any pull rather than leaving it, and take the jumper off before your cat is left alone for a long stretch.

Who it's for: owners of Sphynx, Devon Rex and slim short-coated cats who visibly feel the cold indoors, and who want a layer their cat will keep on.