Check the listing for details. New in Package Extra-small Polypropylene undershirt long john top Polypro. Condition: New. Listed at 8.95 USD. New in Package Extra Small Polypropylene cold weather undershirt long john topThe polypropylene undershirt are ECWCS development items. The underwear layer next to the skin acts as a moisture wicking layer and serves to draw moisture away from the skin, transferring it to the outer layers. The undershirt has long sleeves and a turtleneck that has a center front zipper which extends to the middle of the chest area. The zipper allows for ventilation at the neck and chest area.The underwear is made of a brown-colored (brown 436) knitted, brushed, multi-filament polypropylene terry-loop material conforming to MIL-C-44161. These shirts are new in package. NSN: 8415-01-227-9547 Made in the USA. Pictures listed will not be the exact item you will receive, but are shown as stock photos only. Technical Data | NSN 8415-01-227-9547CharacteristicSpecificationsUSER DESIGNATORMAN AND WOMANFIBER MATERIALOLEFINCLOTH NAMEKNITTED AND TERRYCOLORBROWN, US ARMY, 436 OVERALLGARMENT SIZEEXTRA SMALL MAINBODYGARMENT SLEEVE LENGTHFULL LENGTHNECK OPENING TYPETURTLEFEATURES PROVIDEDINFRARED REFLECTANCESPECIAL FEATURESCOMPONENT OF EXTENDED COLD WEATHER SYSTEMNONDEFINITIVE SPEC/STD DATAII TYPEMANUFACTURERS CODE58536NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCEA-A-5524