Wear out date for Black Army goretex liner(jacket)?

I have been out of the Army for a while...I just agreed, for some reason, to join a reserve unit. I need to report tomorrow and brought my black gortex liner to wear with my ACU's, it's like 18 outside. I went on base tonight but didn't see anyone wearing the black one with ACU's BUT I did see the green ones. I didn't bring any other coat, can I wear it?