Their advantages:

• Minor scratches
  
  
• Contamination
  
  
• Protection from influences of the weather
  
  
• Protection from unauthorized access (From the Check-In up to the hotel)
  
  
• Safety device of baggage belts and zippers
  
  
• Easy recognizing at the goal airport
  
  
• Protection from unauthorized packing up of foreign articles
  (Drugs, Weapons, tariff goods, artifacts )