Dream 10 Inch Hybrid Mattress, Full Size High Density Foam and Pocket Spring Mattress in a Box, CertiPur-US Certified Foam is super impressive. It is super heavy , needed another person to help. Once opened it expanded quickly. It's a high quality and super strong. It's a beautiful mattress and super firm and very comfortable and durable.  I had a very good night sleep.  This will last for years. No more aches and pain and sore back. I would highly recommend this fantastic product.