Cold lasts a long time-great product for the knee
This product works extremely well.  So much colder longer than any other.  It doesn't fit all the way around the knee but covers most of it.  When you put it in the refrigerator to freeze it, you want to lay it flat as it molds to the shape you put it in so if you just throw it in, you may have to wait awhile for it to loosen to fit around your knee.  Although it is for the knee, you could use it elsewhere like your back or thigh and lay it flat.  It collects some frost so good to have a towel under it where you can.  I'm really pleased with it.
Rating: 5 stars