Usage:
With a simple squeeze of the ice pack (break the inner liquid pouch to mix liquid and harmless chemical), it gets cold immediately and remains cold 15~40minutes and go down to temperature of 25F.
Function:
Perfect for stopping pain and swelling fast. Ideal for sprains, strains, contusions, minor burns, toothaches simple headaches, insect bites etc. And muscle spasm
Theory:
When the affected part gets cold, the blood vessel will get shrink, so as to control swelling, relieve pain and remove tiredness. ( Suggestion: Please use cold compress with 48 hours after injured)
Features

Single use cold application without the drippy mess of ice cubes
Needs no refrigeration, convenient and portable, for use whenever and wherever instant cold therapy is needed, for outdoor activity and first aid