Sweater cashmere blue
As with all wool and cashmere sweaters, machine wash cold on the gentle cycle. Do not dry on a hanger as this will stretch out the shoulders; lay it flat on a towel. After the first wash the garment will shrink about half inch in every dimension, but will not shrink more after that.
Heated drying will cause excessive shrinkage. Avoid dry cleaning, as the chemicals are harsh are natural fibers. It's best to wash your sweaters yourself, but any good cleaner, given these instructions, will suffice.