Here's a link to a popular article about research on textiles recovered from Qumran, the site of the Dead Sea Scrolls.
It seems the Qumranites dressed exclusively in white linen, just like Josephus' descriptions of the Essenes.
The article exaggerates, in my opinion, the amount of debate about the identity of the authors of the Dead Sea Scrolls. The majority of scholars have been convinced that they were Essenes almost since their initial discovery, although there have always been a few dissenting voices that have gotten more press coverage than their theories necessarily merit.
The idea of the Qumran site having been a fortress is not new: however, it was not built with defensive fortifications, and there is little in the area that the vicinity that the Romans would have been interested in defending (for example, see this article).
There are many lines of evidence that converge to identify the Qumran community as an Essene settlement. This latest contribution of data from textile studies is a welcome confirmation of what most Qumran scholars have already believed.