INSTANT COLD COMPRESS - Use these 4"x7" breakable ice packs for minor injuries and initial emergency pain relief. Squeeze the top and bottom of the pack together to activate until a pop is heard, shake well, and apply on the affected area for 10 to 15 minutes for immediate relief. TRAVEL ICE PACK - No need to keep in a freezer. These ice packs are portable at 4"x7" and are airplane safe provided the mix hasn’t been activated. Dispose properly after one time use. Great for use on the road, office, clinics, conventions, school, travel, and sports teams. BULK CASE - Langyouchem emergency cold packs e in a bulk case of 50 perfect for all your needs. Keep these medical ice packs in home first aid kits, baseball first aid kit, and survival kits. PAIN RELIEF - Immediate relief for soothing bruises, pain, and inflammation. Use the instant cold pack for first aid relief, muscle sprain, spasm, bruises, nerve pain, stings, headaches, and fevers. Langyouchem is a Chinese based pany that takes pride in our hot and cold therapy products and customer service. We offer free returns within 30 days and are here to answer any of your questions - just reach out to us and we’ll be happy to help.