Is there a preference on the type of shirt stays that my son needs for the NROTC? Should they be a certain color or colors? Also, he said that he needs a briefcase to carry on days that he wears his uniform. Are there specifics for the type of briefcase? Leather or canvas? Is there anything else that he should have (that is not provided)? He already completed Orientation Week so we have that gear in place. Thanks in advance. Go Navy!