Looking at Dawns early draft of a CRL the material looks quite heavily patterned and a wool/fleece type, with a single stitch line vertically on the front.
On the Last Jedi Book cover, the fabric looks to be smoother with a double stitch line on the front, possibly to hide a zip or Velcro?
On other pictures taken at the premiere, the material looks different, almost like a textured wet suit material. Again, these seemed to have only one stitch line at the front.
I guess my questions are
1) Are the photos all from LFL costumes?
2) would the fastener be Velcro or a zip?
3) should the fabric be based on a particular picture or any of them?
4) Is the neck seal and shirt 2 separate pieces?
I guess any discussion is speculation until the CRL is done. I just thought it better to be over here than getting lost on the Facebook group.
Dawns Photo from potential CRL

Photo from Last Jedi Visual Guide cover

Photos from European Premiere

