I ordered 2 of these to pack my kids into new 4" foam mattresses for our RV we intend to live and travel in. The 4" foam was cut to 30"x75"x4" which is 30x75 the recommended measurements for this cover. One of them blew a hole in it when laying the foam, both were very large. A crib mattress will never be 8" thick -12" thick, that's crib size! Crib mattresses are thin! This cover is designed for a thick, very thick mattress. There was so much excess vinyl fabric in it that it was ridiculous, I had to fold it all up and tape it down to make it "work". Long story, super disappointed! Also, I prefer not to have a plastic lid, but if it fits well I wouldn't care. Nothing good to say here!
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