I would like you to read this open letter posted here.
Here's a snippet of what's written:
May the wise women of Klal Yisrael take notice and improve their ways in order to help bring Moshiach speedily in our days, by dressing modestly everyday.The wearing of elastic, tightly fitted, and thin shells as outer garments by women in the Orthodox Jewish community is becoming widespread. In the view of numerous rabbanim with whom I have sought guidance, the shells worn as such often violate laws of tzniusas well as those prohibiting following in the ohudv ,ueuj. I am writing to you to direct your attention to the issue.Shells originally entered the Orthodox Jewish world as a mechanism for countering mild transparency in women’s garments. Worn as an undergarment for blouses and dresses that were borderline modest, the shells added bulk to the materials to render them opaque. While not the pinnacle of modesty, this approach did help to achieve a basic modesty for women that struggled to find intrinsically modest garments in stores. It is important to note that the shells purchased for this purpose were sized to be tight-fitting so that they would fit under the outer garment. They were constructed of light and elastic material for the same purpose.In recent months however, many women have taken to wearing the same tight-fitting shells with garments that are not themselves modest in any sense of the term. I refer to tank tops, vests, halter-tops, spaghetti string tops, short sleeve shirts, and sleeveless dresses. The idea seems to be that pairing a patently immodest garment with another patently immodest garment will somehow yield a modest one. However, the wearing of tight-fitting shells as an outer garment on the shoulders, back, arms, and, chest is immodest.
Let me remind you, my precious readers, now that we know not all shells are modest, ModestAnytime.com has shells that are not only modest but kosher for sale, either as sewing patterns or ready-made or custom made. Ladies, don't delay. Jump at the chance to be more modest!