The Vinyl CorPak provides intense cold therapy to help relieve headaches, ease pain, and help reduce inflammation associated with strains, sprains, and other soft tissue injuries. The blend of bentonite clay and food-grade propylene glycol fill remains flexible, comfortably contouring to painful areas; various sizes accommodate any treatment area. The durable exterior easily wipes clean, making it ideal for clinical use. Simply store the pack in the freezer for a minimum of 1 hour prior to use. Reusable. Contains no latex. Made in USA.