What type of horse has long white leg hairs?

You're describing a horse with "stocking" markings, which are white markings that extend from the hoof to the knee or hock on the legs.

While stocking markings can occur in many horse breeds, they are not specific to any one breed.

Here are some examples of breeds that commonly exhibit stocking markings:

* American Quarter Horse

* Arabian

* Thoroughbred

* Paint Horse

* Appaloosa

It's important to note:

* Stocking markings can vary in size and shape. Some horses may have full stockings that extend to the knee or hock, while others may have partial stockings that cover only part of the leg.

* The presence of stocking markings is not necessarily indicative of a specific breed. Many different breeds can have stocking markings.

If you are looking for information about a specific horse breed, I recommend researching that breed specifically to learn more about its markings and characteristics.