8. What is the difference between the orange and blue cooling patches, and how long do they last?

• Orange patches: Provide cooling at 6°C (44°F) for up to 30-40 minutes.
• Blue patches: Provide cooling at 15°C (59°F) for up to 70-80 minutes.
  
  In hot conditions, layering the patches (orange on top of blue) extends the cooling effect. Placing ice-cubes on the patches also extends the cooling time further (up to 20-30 minutes extra time).