I’ve had this mattress cover in a king size since 2020. It really is waterproof. At this time my first dog was not potty trained and she relieved herself on my king size Tempur-Pedic mattress multiple times. This stopped it from damaging my investment! I also feel a cooling sensation from it which I love, I’ve bought covers where it felt like a terry wash cloth and I was sweating ridiculously. NOT THIS ONE, this one is cool and breathable. Conforma easily to the deep, king mattress. Buying again because I’m replacing my old box-spring, full mattress I have in the guest room. To wash it I’ve set it on a normal, cold water setting and let it run. To dry it: low heat for 30 mins or medium of 20 mins or less. The water proof part will still feel wet, but the outer edge material, If damp, I let it air dry. Again I bought my first in Feb 2020 and coming back Dec 2024 to buy it again.