This is very nice. It started cool and it became hot. It's good for the legs after a long day of walking. It just to relief tiredness. Im not sure why it is meant to just be cooling as it turn quite warm after for me, which feels really good actually. It feels nicer warm, I guess cause I was in Japan using this. The weather was cold, so something warm feels better. Anyway, my leg was not really very tired, so I don't know how good this really is. But it just feel nice I guess.