Reusable cool packs offer instant relief for minor injuries and muscle aches, making them essential for any first aid kit. Simply chill or warm them for quick, effective treatment. Enjoy long-lasting use with a reusable design. Relieve muscle aches and minor injuries swiftly. Prepare easily by chilling or warming in minutes. Store conveniently in any first aid kit with compact size. Safe for all ages, ensuring versatile use. Whether recovering from a sports injury or managing daily discomfort, these cool packs are your reliable solution. Their reusable nature ensures they're always ready for action. Add them to your first aid kit today for dependable relief.Specifications Chill Time: 2 hours in fridge/freezer Warm Time: 4 minutes in warm water