The Irish National tartan in wool is already produced. See the Stillwater website.
Jerry has contracted with the patent holders of the tartan to produce it it in acrylic material.
As for the Isle of Skye tartan, it is currently available in wool or Poly-viscose so I imagine it isn't really a contender for the next Stillwater kilt tartan option.
However if IoS is high on your list check with Pete at Canadian Casual Kilt or Rocky at USA Kilts for IoS in PV.
Cheers
Jamie
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