I like the mattress encasement but it is huge

I like the mattress encasement but it is huge. I have to tuck it under my mattress. My mattress is about 10" deep and the encasement fits any mattress depth up to 18". I was under the impression that it was a stretchy material. Therefore, it would fit my bed but stretch out to 18" if needed. That is not the case. I didn't send it back because I plan to get a mattress pad to put on my bed underneath the encasement so that extra room will be needed. It appears to be good quality. It's a bit sturdier than I expected, which is good. However, after sleeping on it for a couple nights, I have noticed that it causes me to sweat. It is way too hot. I might just have to call this a loss.

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