In motorsports there are the SFI standards for safety harnesses. These help sanctioning bodies verify harnesses for use in racing and keep drivers safe. Among these standards is a build date stamped on the harnesses, which most racing organizations follow to make sure belts are less than 2 years old. After 2 years of use and ultraviolet (UV) rays from the sun, safety harnesses can break down rapidly. In addition, SFI recommends that safety belts be replaced after any major incident or wreck where they might have been highly strained.