I've had the product for a little over a month. It definitely turned out to be waterproof as I have two young children who love bringing drinks into my room and drinking (dropping) them on my bed. It tends to slip a bit on my bed because my mattress isn't very deep. I have a TempurPedic, but the king-size lid is a bit deep for it. At the same time, it is very soft and does not cause overheating. It also doesn't make any hoarse noises, which is very nice. Overall I am very happy with this mattress topper.
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