Flammable and toxic "" "", how long life?
There are two types of polyurethane foam and polystyrene foam!
Some polyurethane foam, some polystyrene foam.
Non-toxic Flammable or not depends on the production of the time there is no plus flame retardant, the general GB is required B1 level, and non-flammable.
Life expectancy, three to five years can certainly use = =
