As defined by the vegan society. “Veganism is a philosophy and way of living which seeks to exclude—as far as is possible and practicable—all forms of exploitation of, and cruelty to, animals for food, clothing or any other purpose; and by extension, promotes the development and use of animal-free alternatives for the benefit of animals, humans and the environment. In dietary terms it denotes the practice of dispensing with all products derived wholly or partly from animals.” While you could get wool carefully witout harming the sheep, it is still exploitative. That is assuming you are using it for profit or for making things with the wool. Keep in mind in an animal sanctuary you will need to sheer the sheep for their health. Humans have bred these fine fellows to grow more wool than they naturally would, which causes many health issues. We have created a sentient being, for the purpose of expoilting it for it’s body parts, that is dependent on us for their health and safety. So no, even if you sheer them nicely, it’s still expoilting them. Animal sanctuaries, the vegan ones, will often use the wool to keep the barns the sheep are in insulated, for bedding,etc. Basically using it for the sheeps well being. Animals are not ours to use and exploit for our own purposes.