Always read and follow the care instructions and any warnings on the garment label. And, follow the General Rules for washable fabric stain removal.
This is a real tough one, and may be permanent. It can penetrate into the fabric and when it dries coats the fibers in a harden "plaster." Unless there are instructions on the product label, you can try specific stain removal products available at the grocery or drug store, such as Carbona's "Stain Devils®" or take the stain to your dry cleaner and tell them to treat it as a paint stain.
DRAPER BODY THERAPY® WINTER CAP
This fuzzy and comfortable cap provides the wearer protection in cooler weather with added therapeutic benefits. It is used over the ears and crown area (head) to provide an increase in circulation along with regulation of body temperature. The Draper Body Therapy Winter Cap contains 50% Celliant® (Polyester) and 50% Polyester. Celliant® is the world's most technologically advanced fiber which contains a proprietary blend of minerals which have been extruded into a polyester fiber. Learn more about this technology. Shop for this technology>
DR. COOL WRAP
Wrap your injuries in a choice of three sizes: Small (3"), Medium (4"), or Large (6"). The wrap replaces traditional bags of ice and combines cold therapy with compression to help reduce swelling and speed recovery. Use the Small ice wrap on your wrist, ankle or foot. Use the Medium wrap as an injury wrap on your knee, elbow or ankle. With a Dr. Cool ice wrap, your injury won’t hold you back. Learn more about this technology. Shop for this technology.