Description is from the 509 website:
Get twice the style with the 509 Reversible Beanie. With different colors on both sides, simply flip it inside out for a brand-new look. Form-fitting skullcap style, plus 100% acrylic fibers for quick-drying, wool-like warmth and long-lasting comfort.
Materials: 100% Acrylic
WARNING for California Residents
Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
What is Proposition 65? "Proposition 65 requires businesses to provide warnings to Californians about significant exposures to chemicals that cause cancer, birth defects or other reproductive harm. These chemicals can be in the products that Californians purchase, in their homes or workplaces, or that are released into the environment. By requiring that this information be provided, Proposition 65 enables Californians to make informed decisions about their exposures to these chemicals." To find out more, visit https://www.p65warnings.ca.gov.