... cold,outdoor and work in open country,outdoor sport,go out for travel.it is a good to which ... illness,improve sleep,etc.Keep warm:suits for that go to school,travel,outdoor work,work on night,work ... in sea,guard,stand guard, mountaineering,go fishing,skee,etc.when weather being cold.Medical treatment: ... oil.Put handy warmer into clothbag when use over. sell no.006 steel hand warmer