These are the best pillow protectors I've used.
The fabric is far better than other products, smooth and soft, allowing pillowcases to be slipped on with ease instead of the struggle the 'paper' type of product causes. Having the pillow securely zipped into the protector is a huge advantage. It's fully protected, does not gape in an unsightly fashion and makes older pillows behave as though they are new.
In our B&B we are constantly bed-making/changing and these have made life much easier. Just ordered 8 more!