A dressier board shirt: The Custom Worsted Wool Pendleton Board Shirt Solid Blue, 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. 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 solid blue. (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.