What is the purpose of the antifreeze in gel packs?

The purpose of the antifreeze in gel packs is to prevent the water from freezing solid. When gel packs are used for therapeutic cooling, they need to remain pliable so that they can conform to the injured area effectively. If the contents were to freeze solid, the pack would become rigid and less effective for treatment. The antifreeze component allows the gel to reach lower temperatures without solidifying, ensuring that it retains a gel-like consistency. This ensures that the pack can provide effective, continuous cooling while maintaining its ability to adapt to the contours of the body.