Greenspan's is bringing back the Short Sleeved Custom Worsted Wool Pendleton Board Shirt Green Plaid, made exclusively for Greenspan's, South Gate, California, as part of the world's best selection of Pendleton Woolen Mills board shirts, made in Sir Pen material, color Green plaid. This pattern is now avilable at Greenspan's, and only Greenspan's, in the board shirt model. The worsted wool is a tighter weave smoother wool, rather than the looser weave, thicker, Umatilla flannel. Color green plaid. (Reminder: this is not a flannel material! If you are not familiart with this kind of virgin wool, Here is a comparison: Just like cotton has tighter thread counts, this is a tighter weave wool.