Instant cold compress temporarily relieves minor pain and swelling for sprains, aches and sore joints. It is perfect for injuries occurring during baseball, football, lacrosse, soccer, tennis, basketball, golf and all other sports. No pre-chilling is required. It does not contain ammonium nitrate. Single-use cold pack is part of the innovative SmartCompliance Program that redefines business first aid. Clearly labeled compartments create a cabinet (sold separately) that is easy to use and restock.