Will the mattress have a smell when I first open it?

The OTTY may have a slight smell when first unpacked – but don’t worry. It’s not dangerous, and once aired out, the smell will go for good.

OTTY is also Europur and Certipur approved and is made with the very best certified flexible foam. No ozone depleters, TDCPP, mercury or lead are used in the manufacturing process

https://www.europur.org/certipur/en/authorized-users-of-the-certipur-logo