Instant cold pack

Basic information
1.Product size:13*15cm/15*20cm
2.Weight:100-280g
3.Materials:urea+warter/calcium ammonium nitrate+warter
Function：
Cold use:
1.Reduce body's temperature
2.Relieve pain and reduce swelling
How to use 如何使用：
1.Squeeze the water bag inside with your hand.
2.It can release cold with 5 seconds when it is activated,the temperature keeps 8℃-14℃。