This group is the most difficult to categorize. Women who fall into this category choose their clothes for their simplicity, classic style and ease of wear. While they still seek to express their religious convictions through what they wear, they also are much more likely to choose to blend in with the dominant fashion styles. Skirts and jumpers are popular, and trousers for women tend to be perfectly acceptable. Least likely of my religiously observant dress designations to choose to cover, women in this group are most likely to have shorter hair styles, as shorter can be simple and easy to care for. Makeup is often avoided as a statement on simplicity, but jewelry is common, particularly earrings. Actual plainness (solid colors, simple print, limited-palette wardrobes) is a hallmark of the plain-modern look. There are neither anachronisms nor symbolically and there are no traditionally important items.
Some plain modern resources:
AND all Friends, take heed of Jars and Strife. . . . Therefore dwell in Love and Life . . . which is the Honourable, Royal State. And all that Speak or Preach abroad, see, that ye be in the Life, and Power and Seed of God, which will Edifie the Body, and not in a brittle, peevish, hasty, fretful Mind; but dwell in that, which keeps down the contrary, that that may speak, which edifies the Body in Love.
And all take heed of Vain Words, and Tatling idle Words, but every where stop such; ...
I am not Amish or Mennonite, but some people who come to my website are interested in knowing more about these groups. I can recommend these books as authoritative and relatively inexpensive sources of further information.