Organic/non-toxic play yard mattress

Babeh • 🍁 November 2015 🍁
I'd like to use a Chicco Lullaby Baby bassinet and play yard instead of a crib. Ideally though I'd like to have a safer, non toxic mattress (basically not  polyurethane foam) that fits the dimensions, but I can't find anything!! At this point I'd settle for any safe mattress that will be good long term for my baby. Any recommendations?