The cooling compress COLD PACK by MFH. This single pack with dry ice is ideal for the injury or contusions. Relieves pain and reduces swelling. Usage is simple and intuitive - just squeeze the ice pack in accordance with the front picture, and then shake it gently. The small dimensions of the package allows you to store compress in almost every pocket of the backpack, bag or partition. The low weight makes it is not a burden, and in an emergency can be very helpful.