Hello. Thank you for visiting our store, we buy things in a licensed pharmacy in the European Union. Effective first aid for sprains and bruises. Cold compress treatment relieves pain and promotes healing. Ready to use. Convenient to carry with you when traveling, use at home, in the country and in the car. composition Calcium ammonium nitrate, Water Dose 1) Fold in half so that the inner package bursts. 2) Shake the package. 3) Do not use cold therapy for more than 20 minutes.