This pair pack includes a pair of bands for either your arms OR your legs.  It is built personally for you.  The pair pack comes with: 

• 2 total bands: 1 pair for your arms OR 1 pair for your legs
• 1 hand pump
• 1 carrying case
• 1 license for our guidance app

The most common sizes are #2 (Red) for the arms and #4 (Yellow) for the legs