The Sphynx (aka Canadian Hairless) is a rare breed of cat. The Sphynx appears to be a hairless cat, although it is not truly hairless. The skin should have the texture of chamois. It may be covered with very soft, fine down, which is almost imperceptible to both the eye and touch. On the ears, muzzle, tail, feet, and scrotum, a short, soft, fine hair is allowed. Lack of coat makes the cat quite warm to the touch. Whiskers and eyebrows may be present, either whole or broken, or may be totally absent. Their skin is the color their fur would be, and all the usual cat marking patterns (solid, point, van, tabby, tortie, etc) may be found in Sphynx too. People are surprised by how different their personalities are. Many describe them as part monkey, pig and human becuase of how intelligent, extroverted and affectionate they are.

Sphynx cat with typically large ears.

Many people with typical allergies to furry cats find that they tolerate the sphynx breed. This may be due to the fact that the proteins in cat saliva are often the culprit. Because sphynx lack hair and do not leave it behind, many have fewer difficulties living in harmony with the breed. There is no guarantee, however, and allergies vary greatly between individual people.

Sphynx cats are not maintenance-free. Their lack of hair results in increased body oils. Regular bathing is often necessary. Care should be taken to limit the Sphynx cat's exposure to outdoor sunlight at length, as they can develop a sunburn, similar to that of human exposure. In general, Sphynx cats should never be allowed outdoors unattended, as they have limited means to conserve body heat in colder temperatures, and their curious nature can take them into dangerous places or situations.

The Sphynx breed is known for a sturdy, heavy body (many cats of this breed also develop a pot belly), a wedge-shaped head, and an alert, friendly temperament. Although hairless cats have been reported throughout history (hairless cats seem to appear naturally about every 15 years or so), and breeders in Canada have been working on the Sphynx breed since the early 1960s, the current American and European Sphynx breed is descended from two lines of natural mutations:

Other hairless breeds might have different body shapes or temperaments than those described above. There are, for example, new hairless breeds, including the Don Sphynx and the Peterbald from Russia, which arose from their own spontaneous mutations. The standard for the Sphynx differs between cat associations such as TICA, FIFE and CFA.

Sphynx hairlessness is produced by an allele of the same gene that produces the Cornish Rex, which has only one of the usual two fur coats. The Sphynx allele is incompletely dominant over the Devon allele; both are recessive to the wild type. Sphynx were at one time crossbred with Devon Rex in an attempt to strengthen this gene, but unfortunately this led to serious dental or nervous-system problems and is now forbidden in most breed standards associations. A genetic heart defect was also introduced by the Devon Rex breed. The only allowable outcross breeds in the CFA are now the American Shorthair and Domestic Shorthair. Other associations may vary. In Europe mainly Devon Rex has been used for outcrosses.

In 1999 SGC Apophis Nordstrom of Classical Cats won the TICA International Alter of the Year. In 2006 SGC Classical Cats Valentino won the TICA International Cat of the year. In the Cat Fancier's Association, GC, RW, NW Majikmoon Will Silver With Age was Cat of the Year for 2006. The following year, GC, RW, NW Enchantedlair NWA Cornflake Girl was Kitten of the Year. These awards are handed out for the highest scoring cats, across all breeds.