I am using one for the guest bedroom where I wanted to protect against the feather protrusion. I think that "It prevents feather protrusion" should be added to the list of the product description. Noiseless and breathable fabric, I would say. I am using another set for my Pillows which are memory foam btw. These have a tendency to smell awful due to the fact sometimes I sleep before showering after a hard day at work or gym. I don’t think there is any solution except throwing away your pillows, Please tell me I am right? Typical pillow covers don't do a good job of keeping the pillow from smelling especially when liquids such as drool or sweat is involved but these are just terrific protectors since they're waterproof. I also like the zipper part bcz they are so easy to put on or take off and toss it for a quick spin. They're machine washable in warm or cold water! Can’t get any better than this.