Description from Knitpicks.com:
Shamrock is our salute to the Emerald Isle. Shamrock has three plies of solid color and one hand-dyed ply. The result is a colorfully flecked fabric reminiscent of classic tweed.
Note:** The balls are marked with the hand-dyed dye lot. Several hand-dyed dye lots are included in one solid dye lot for the other three plies.