From the label:

100% Acrilan Acrylic Fiber by Monsanto

© 1973 Hall Bartlett, all rights reserved.
“A very special yarn based on the very special thoughts expressed in JONATHAN LIVINGSTON SEAGULL”

Machine Washable & Dryable
Colorfast
Article 214

“For creating any number of imaginative, unique items by any handcraft process you choose -- rugs, crocheting, knitting, macrame, etc. The versatility of this acrylic yarn is limited only by your desire to create.”

Manufactured by American Thread®
Stamford, Conn.

Always buy a sufficient supply of the same Dye Lot Number to complete each article.