Information about this yarn, per their web page:
Stitches great. Less filling. Our gorgeous Double-Knitting weight silk yarn is perfect for adventurous beginners. Made with love. Guaranteed to please.

PRODUCT SPECS:
Length: 150 yards
Yarn Weight: 3 - DK/Light Worsted
Yarn Material: Recycled Silk
Needle Size: US 5-7/3.75-4.5mm
Hook Size: US 7-I 9/4.5-5.5mm
Physical Quality: Soft and Silky!
How to clean: Dry Clean or handwash cold.
Best for: Knitting, Crocheting, Weaving, Mixed Media