Read it HERE... it's a short one.
Summary: Zion and her daughters shall be redeemed and cleansed in the millennial day—Compare Isaiah 4. Between 559 and 545 B.C.
In these 6 brief verses Isaiah is talking about the millennium. I find it very interesting and comforting that there is a specific chapter that speaks of the daughters of Zion- women, and how we will be redeemed and cleansed. Verse 1, as I interpreted it, speaks of those women who were single in this life. The Lord will not take away their independence and hard work, but will take away their reproach, shame, or the name of "old maid".
The women who are found in Zion will be called holy. They will then be washed (purged from blood of Jerusalem).
I think verse 5 is speaking of the temple and the way in which they will help cleanse the people, and stand as a beacon, symbol, and defense for the people. Verse 6 speaks of a tabernacle that will stand as a place of refuge from the elements... which could also be interpreted as the temple and the "elements" could be symbolic for spiritual and emotional storms that may rage.
Although brief I think it very poignant that the Lord includes this specific chapter in the Book of Mormon as a reminder to his daughters that he loves and cherishes them, is thinking of their every need, and knows their weaknesses and filth and wants to redeem and cleanse them anyway. I find huge comfort in that.