My daughter bought a mattress from a neighbor for a spare room and felt encasement was best since it was a gently used item.  I looked for allergy and bug protection.  When  the queen sized item arrived I was immediately impressed with the waterproofing aspect of the cover as well as the substantialness of the fabric itself.  I washed it without any change in size or shape.  The mattress is 9-10" deep and it went on easily with some room to spare.    I was concerned that the waterproof layer would be noisy but it was not.  I did not smell any "new product odors".  I would not hesitate to use this on my own bed and would recommend it to someone else.  Appears to be a great product but has only been on the bed for about two weeks.  Would buy again.