This is very a common question; first thing to remember is not to worry. Due to the chemical composition of all foam based products, the process invariable means that some odour may be present, especially if the foam block has been freshly cut. The odour has been described as being similar to damp.  This will soon disappear, sometimes within a day or two after the mattress has been left to air. If you have any queries, please call us and talk to one of our representatives who will gladly explain any issues.