... ,headaches and more Lightweight and flexible even when cold Reusable for years of professional grade thermotherapy Latex free and non-toxic ... out after 20-30 minutes, as cold pad.Function:1)For physiotherapy ,it works especially effective on muscle relaxation, muscle aching ... and shoulder aching,cramps ,arthritis pain,tenontodynia and etc.2)For warming ,it is very useful to the outdoor activities of ...