The Allerease pillow protector is soft to the touch and appears to help make the pillow cooler at night.  We use it on the guest room pillow and folks who have stayed with us noticed a difference as compared to pillow covers used on the other pillows.  
Also, if you don't trust pillows in hotels, get a few for your trips to use there.  
The pillow covers appear well made with strong stitching.  Easily applied onto our standard pillows.