The CWU-86/P is an anti exposure coverall with reinforced ruggedized patches to withstand the use of the U.S Navy aircrew men on flight over water. Flyers coveralls are proven to protect the wearer from exposure against hypothermia and exposure to cold water, wind spray, and rain in the event of a water landing.The size is Medium Regular, NSN 8475-01-532-9212, and MFR date was March 2019. See pictures for details. The suit is brand new with the original plastic bag (opened for pictures only). If you have any questions feel free to email.