Most people buy sheets for their bed, expecting to sleep on them. However if you own a cat, you already know that your bed is the cat’s bed and that anything you own belongs to the cat as well.
While you could buy expensive sheets to treat yourself, the truth is that no matter what you buy, it will wind up treating your cat. So go ahead and buy the most comfortable sheets you want as long as you know your cat will be the one getting the most enjoyment out of it.