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® SLEEP LINERS
This Body Therapy® Sleep Liner offers therapeutic benefits while you sleep. The Sleep Liner allows you to use your already comfortable mattress, while helping to relieve soreness/tension throughout the body. The Draper Body Therapy Sleep Liner contains 85 % Celliant® (Polyester)/15% Recycled PET (Polyester). Celliant® is the world's most technologically advanced fiber, containing a proprietary blend of minerals extruded into a polyester fiber. Learn more about this technology. Shop for this technology>
ATTITUDE SUPPLY SACK PACK
Made with coated ripstop Nylon fabric on top and 500 denier coated Cordura® Fabric on bottom. Sack Pack features include: Big, outer pocket with waterproof YKK zip closure; Double stitched with Nylon threads; Light loop to be seen during night rides; Chest strap for action sports; and can be folded in its inner pocket for convenient carry. Handmade in Milan, Italy. Learn more about this technology. Shop for this technology.