There are some differences between conventional men's fashion and butch fashion. Although butch expression is masculine, it doesn't follow or even subverts the rules of conventional men's wear, and has ways of flagging MOGII identity. Some transgender men-- and people of other genders who intend to pass as men-- are surprised to find that what they thought was masculine attire turned out to instead be butch. As a result of their butch attire, people tended to see them as masculine women rather than as men. Gabriel's web-site The FTM's Complete Illustrated Guide To Looking Like A Hot Dude talks about some of these differences.