From the manufacturer:
Even the best yarns wear down with frequent use and machine washing until now. Even before it is spun the fiber is treated to resist pilling. When pills do form due to frequent use and washing, no need to pick them off. Just throw the item in the washer and the pills disappear. It is super soft and has great stitch definition.
-Reflective: 88% Acrylic, 12% Polyester
-Reflective: 2.5oz (70g) 115yd (105m)
-Medium weight #4
-4" = 18 stitches on size 8 needles
-Suggested crochet hook: H8
-Machine Wash & Dry