This is the best I have ever been able to find on the fibers from the comforter:
from Sham & Duvet
•Where Found. A sham and duvet were found in the suitcase beneath the train room window.
•Match to Fibers on JBR? "A CBI examiner issued a report indicating fibers from the pillow sham and comforter were found on JonBenet's shirt, on her vaginal area, on the duct tape from her hand, on the hand ligature and inside the body bag." This is the lab report referenced in the Carnes opinion: "A lab report indicated that fibers from the sham and duvet were found on the shirt that JonBenet was wearing when she was found in the wine cellar. (SMF P 147; PSMF P 147.)" (Carnes 2003:Note 32, p. 68).
•Fibers on JBR Unmatched? However, it also has been reported “FBI analysis: FBI examiners said the fibers on JonBenet came from a source other than the pillow sham and comforter -- but none of them matched anything else in the house. "If the FBI examiner is right, the killer had to take that piece of material out with him," Smit said.”
http://jonbenetramsey.pbworks.com/w/page/11682473/Fiber Evidence#FibersfromShamDuvet
Also from the same source:
Earlier in the case, the police had thought the fibers from the body came from John Ramsey’s bathrobe or Patsy’s black pants or from the blanket found near JonBenét or from the blanket that had been found inside the suitcase under the broken basement window. The fibers might also have come from JonBenét’s own clothes or from one of her stuffed animals. By now, however, all of those possibilities had been excluded [emphasis added], and the only logical explanation was that the fibers came from whatever had been used to wipe JonBenét or possibly from someone who might have rubbed up against her when she was unclothed, which allowed fibers to find their way along her skin and eventually into the folds of her labia. In any event, the clothes worn by Patsy and John on Christmas would have to be compared with the fibers" (Schiller 1999a:563; quote and source provided by Internet poster Margoo ).
This all helps a lot doesn't it? (lol)