PROBAN finished fabrics retain their flame retardant properties for the lifetime of the garment. Fabrics acquire their flame retardant properties from the polymer which is embedded into the fabric. It can only be removed by powerful oxidising agents. When exposed to flame, PROBAN fabrics form an insulating char, this stays in place and helps protect the wearer. PROBAN fabrics do not smoulder, have no afterglow, do not melt and the flame doesní«í´t spread outside the charred area