• Economic package: Five reusable hot/cold packs. • High-quality cold gel for a long-lasting cooling effect. • Cold application: Place in freezer or refrigerator for 2 hours. • Flexible up to -21°C, they perfectly adapt to the treated area. • Ideal for first aid. • Heat application: Heat in water at 80°C or in microwave for up to 2 minutes. • Wrap with a cloth to treat the sore area. • Relieves pain. • Cold application areas: Toothache, insect bites, sports injuries, strains, bruises, postoperative, joint pain. • Cold effect: Local pain relief, anti-inflammatory effect. • Heat application areas: Back pain, menstrual, kidney, lumbago, abdominal. • Heat effect: Increases local blood flow and relieves muscle contractures.