The versatile design of the Clover Pack comfortably surrounds painful, inflamed joints with cold therapy. Get long lasting, drug free pain relief by applying mild compression using the adjustable strap to secure the cold pack to the injured area. The pack's 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 even when frozen. The frost-free exterior is soft to the touch and gentle on the skin; it does not need to be wrapped in a towel. This reusable pack will remain cold for 20-30 minutes. When the pack is no longer cold, simply store the pack in the freezer for at least an hour prior to use. Proudly made in the USA.