For all the good of this mattress, the potential health risk caused by the release of gas from build materials is a huge concern.
Many have commented on the “smell” of the Casper when unwrapping. This is caused by the release of gases from materials used to build the mattress. I have measured these gases at dangerous levels that raise serious health and comfort concerns. Be especially careful if the mattress is meant for a child.
I measured Total Volatile Organic Compounds (TVOC) well over 1 milligram per cubic meter (mg/m^3). This makes air near the mattress unsafe to breath for prolonged periods.
In fairness, many other mattresses and everyday items have the same problem. None-the-less, you should ask the manufacturer about these gases before buying.
After all, while sleeping, you are breathing this air 6-12 hours per day. That’s 3,000 hours a year breathing dangerous chemicals.
These gases should reduce over time. I will update my review in 1, 3, 6, and 12 months.