An ice pack is a portable, flexible bag filled with a gel or liquid that can be frozen to provide cold therapy. It is commonly used to reduce swelling, relieve pain, and soothe injuries such as sprains or strains. Ice packs are often applied to the affected area for short periods to help manage inflammation and discomfort. Ice packs come in various sizes and shapes, making them suitable for different body parts. They are typically reusable and can be stored in a freezer when not in use. Many people also use ice packs for cooling down on hot days or during outdoor activities, such as picnics or sports events.