The versatile design of the Core Clover Pack comfortably surrounds painful, inflamed joints with cold therapy. Get long lasting, drug-free relief by applying mild compression using the adjustable strap to secure the cold pack to the injured area. The packs exterior is made of a proprietary blend of synthetic fibers and organic plant materials. The plush fabric slowly releases cold therapy for subacute injuries while the soft surface quickly releases cold therapy for acute injuries. The nontoxic, biodegradable fill in this pack stays soft and pliable when frozen. The soft, frost-free pack is soft to the touch gentle on the skin. This pack does not need to be wrapped in a towel. Simply store the pack in the freezer for a minimum of 1 hour prior to use. The pack will remain cold for 20-30 minutes. Reusable. Made in USA.