Long sleeve work overalls or Coveralls as they are often know are available in different materials. All cotton is hard wearing and well suited to most industrial environments. Cotton also offers some protection against heat, although a flame retardant overall would be even better for heat, especially if flames are involved.
Polyester cotton overalls are another option, these are recommended when dealing with liquids and oils since the polyester repels liquid, cotton will absorb it. The Polyester cotton overalls are often a lighter weight of fabric since the polyester strengthens the fabric so it can be thinner. Since polyester will melt when exposed to heat, they would not be recommended for processes such as welding.