I live in Pensacola and am starting OCS on the 11th of Feb. I went to pick up the required pairs of tighty whities, and the only kind they had at the Portside NEX on NAS was white with a grey elastic band. Is the grey band allowable at OCS?? I figured they were since that's all that was sold at the NEX, but you can never be sure about these things. Thanks a bunch.