VERY airtight

It is so airtight that with a little space between the mattress and the mattress encasement, air gets trapped and is difficult to remove. This is fine with me, as it has the effect of an air mattress, and makes the whole thing more comfortable - at least to me. Installation was a bit difficult due to the fact that the had to be slipped down into the encasement. However, being an elderly woman, I could accomplish it pretty easily alone. I think it is a nice product. Came on time with no hassle.

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