From the label:

Machine wash and dry. Use gentle cycle and cold water. DO NOT BLEACH. Do not tumble dry/iron or press with heat. Lay Flat to dry. Non-Allergenic.

100% Polyester.
NC420A Luxe Multicolors
50 g. ball/1.7 ounces

imported by MultiCraft Imports Inc.
Ottawa, ON, Canada
Made in China.

Label also contains the same information in French.