Neoprene foam, also known as polychloroprene, is a synthetic rubber foam that is created by adding a foaming agent, usually nitrogen gas, during the rubber manufacturing process. Laser processing of neoprene foam is possible with either a 9.3 or 10.6 micron CO₂ laser without any noticeable difference in processing quality. Laser processing is also possible with a 1.06 micron fiber laser. Laser cutting of neoprene foam with a CO₂ laser produces a smooth cut with sharp edges, a slight discoloration, with a slightly tacky surface. Laser cutting of thin neoprene foams can be performed with a 1.06 micron fiber laser, leaving a slightly tacky and discolored edge. Laser engraving of neoprene foam with a CO₂ laser produces uniform depth with a slightly discolored surface depending on the material composition. Laser engraving of neoprene foam with a 1.06 micron fiber laser will create a shallow engraving with a smooth surface. Laser marking of certain formulations of neoprene foam is possible with a 1.06 micron fiber laser creating a light gray mark on the surface.