... -aid purpose as a cold compress ,the pack is reafy to use when you get it ,it has an inner ... inside,once you find the inner bag then squeeze it, shake it heavily to mix the ingredients inside.the whole ... -3seconds works for an hour, useful and amazing.it reduces pain ,relieves swelling and expedites recovery for ... pain and relieve itchiness from insect bites,It can also reduce the incidence of bruising.