Skin-Walker (Native American)- According to legend, a skin-walker is a person with the ability to change into the shape of any animal they choose. Most often however, this must be done by wearing the skin of the animal they wish to transform into.
ItM 034: L.A. Marzulli on Ghost Wolves and Skin Walkers
Skinwalkers - Native American legends, a skin-walker is a person with the supernatural ability to turn into any animal he or she desires. To be able to transform, legend sometimes requires that the skin-walker wears a pelt of the animal. In most cases, this pelt is not used in modern times because it is an obvious sign of them being skin-walkers.
Veda has gone on record as saying that she finds the skin walkers to be the better class of Werewolf because they can become real wolves, she has said that she thinks that in their pure form they're definitely faster than Jax aswell, Jax has had to chase several skin walkers on his bike just to catch them and still came up short.