This really is a great product and soft, well worth all Thermacare the world! This neck warmer and cervical surrounds softness parties weakened by neuralgia; in truth it well around the neck and shoulders (unlike other more expensive products sold which cover the shoulders!) well-being almost immediately, heat diffuses into 3 levels (low, medium, high. Running Mains, we go for two hours with benefits, then possibility for another 2 hours if necessary. Suffering from neuralgia, this relaxes me completely, I recommend it!