Should you air out memory foam mattresses in the sun before using due to fumes?

It only take about 2 to 3 days to get rid of the smell. When you get the mattress just let it air out until its time for bed. Then when you get up in the morn take all the linen off of it and let it air out all day again. I did that and it was fine. If you still smell it just do it for the 3rd day.