This product arrived  quickly and is what I ordered. However, I did have to call and confirm it was what I ordered, as the title of the item on the item was different than what I ordered online. 
The product had labeling that read : Mattress Encasement.  Sometimes a mattress or pillow encasement is not zippered. Once I called to verify, they told me to go ahead and open it,  and sure enough it was zippered. 

Pros: The product had great stretch ability and will suit its purpose. It does not crinkle when you lay down., and because its waterproof, it still is not any hotter to sleep on than a regular mattress cover. .
Cons: Not really a con, but I was thinking the product would be thicker and possibly have more material on the top portion for the price. (Seeing it was originally around 50 bucks, but for 20 , I did get my money worth.)