Safety First Aid Group HypaCool Instant Cold Ice Packs, Standard, for Aid, Sports Injuries and Pain Relief, Pack of 12

Single use instant cold compress ice pack Ideal for rapid reponse to acute strain and sprain injuries during sports, travel and outdoor activities Quick, easy and mess-free method of providing cryotherapy Activates when the inner pouch is squeezed - no need to cool in the freezer. (Note: The inner pouch requires some force to activate, and you may hear a 'pop' when it does.) Standard ice pack pack size is 14cm x 23cm Prior to activation, instant ice packs contain loose granules, which turn to liquid after the inner pack has burst.