There are a whole range of skirting boards in the market for your pickings. MDF has been the most popular in recent years because it is a great quality material made from medium density fibre which is a bit like wood pulp that is compressed to make it hard, then cut into square sheets of MDF. These sheets are then sliced up in to thin strips of mdf which are ready to be profiled. Once profiles you have perfectly formed MDF Skirting Boards
Any other types of skirting boards are going to be in oak, pine or some other type of wood.