I’ve bought so many heat packs in the past and have been dreaming of the day that I’d find the perfect one. Well, now I have. Purple Moon’s heat pack is perfect in every way. It has a beautiful soft cover, it heats well, (I haven’t tried it as a cool pack yet but I’m pretty sure it will be just as effective); and I absolutely love that you can tie it into place wherever it’s needed. It truly is the best ever heat pack I’ve ever owned.