Baby cashmere merino silk are made of 75% extra fine merinowool, 20% silk og 5% cashmere. Machine wash on delicate cycle in lukewarm water using mild soap (neutral detergent). Or careful dry clean with perchlorethylene. No bleach. Lay flat to dry. Ball Weight: 1,75 oz 50 g Ball Length: 127 yds 116 m.