I have been sleeping on this mattress protector for two weeks now and it really does help keep you cool as well as protect the mattress.  It also helped improve the firmness of my mattress.  I live in a senior building and even though every thing inside and outside is kept very clean, they do check for bedbugs in the annual inspection. This cover zips all away round and has an extra zip lock for the zipper to keep it sealed. I have owned mattress protectors before but this one is of a better quality, yet is not hard and stiff.  I am sure it will help prolong the life of my mattress as it is so much more expense to buy a new one. I am purchasing another one for my granddaughters bed in twin size and have recommended it to several of my friends and family.  This is an investment well worth the money especially since we are most likely spending more time in bed than in the past. A very thoughtful purchase.