Cornish Rex

The Cornish Rex has no hair, it has what is called down. Most breeds of cat have three different types of hair in their coats: the outer fur, a middle layer, and the undercoat, which is very fine and about 1 cm long. Cornish Rexes only have the undercoat. The curl in Cornish Rex fur is a characteristic unique to them.
The thin coat of the Rex means they are more suited to indoor living. They can be susceptible to hypothermia if the weather is too cold. They tend to hang around appliances that generate heat or those warm "sun puddles" on your living room floor.
Some Cornish Rexes like to play fetch, race other pets, or be acrobats. The Cornish Rex is an adventurous cat and is very intelligent. It can readily adapt to new situations and will explore wherever it can go, jumping onto refrigerators, examining cabinets, etc. This breed is also extremely curious which can get it into some dangerous situations. Be on the lookout for an occasional washing machine or dryer explorer.
Many people are attracted to this breed due to its rumor about being hypoallergenic. Despite this belief, the Cornish Rex's short hair does not make it hypoallergenic. Allergic reactions from cats are not the result of hair length, the true culprit is a protein produced in the sebaceous glands of the skin, saliva, and urine of cats. Most people who have cat allergies are reacting to the protein. When the cat cleans its fur, the saliva dries and is transformed into dust which people breathe in. Since Cornish Rex cats groom as much as or even more than ordinary cats, a Cornish Rex cat can still produce a reaction in people who are allergic to cats.