The gel pack can be used both hot and cold depending on what kind of relief you need. Whether you're dealing with aches and pains, injuries, or emotional distress, this unique item provides quick relief wherever you are. It's easy to mold into whatever shape you need by gently squeezing it between your hands - so it fits neatly around the neck for those nagging neck aches or snuggles into the small of your back when those sciatic nerves start acting up.