"The Law showed Jehovah's strong feelings against clothing that does not make clear the distinction between male and female - what has been described in our day as unisex fashion. (Read Deuteronomy 22:5.) From God's stated direction about clothing, we clearly see that God is not pleased with styles of dress that feminize men, that make women look like men, or that make it hard to see the difference between men and women." Watchtower 2016 Sep Study Ed. p.18
Circuit Overseer program for elders in 2015/16 s-337a-16-E 5/15 makes the same point. It also says "the elders may determine that the person no longer qualifies to share in the ministry."