The Lifeline Outdoor Instant Cold Pack - large is a great companion to bring during your outdoor trips. This handy instant cold pack is an essential item that can bring instant relief for any sprains, strains, headaches, and minor swelling. Its large and compact size of 6" x 9" makes it very easy to store in your backpack or large bag. The cold pack is usable only once and can last for about 15-20 minutes. In addition, there is a convenient peg hole so you will be able to hang it when needed. Great item for backpacking, camping, outdoors, home, and multi-sports use. Relieve pain and ensure peace of mind when you have this excellent Lifeline Outdoor Instant Cold Pack large.