Zinus 8 Inch Ultima Memory Foam Mattress / Pressure Relieving / CertiPUR-US Certified / Bed-in-a-Box, Twin

is 8 inches to thick

To those who have owned this mattress for over a year, are there problems with "body impressions" or dents where one normally sleeps?

How important is it to wait for 48 hours? Shortly after removing the plastic, it seems to be expanding nicely.

can u sleep sleep on memory foam without the regular mattress under it