Polymer-fortified greases, which often contain polytetrafluoroethylene (PTFE) or other solid lubricants, are often chosen to lower friction, to deliver smooth start-up of heavily loaded devices, and to provide extra protection against contaminants, rust, and corrosion, and to deliver smooth start-up of heavily loaded devices. ECL offers a wide range of polymer-fortified greases, including damping greases that can be custom-formulated to control the rate of motion, "tactile feel," and acoustic qualities of mechanical parts.