Open/Close is the B-side of the ninth single released from the I'm With You Sessions singles collection.
- Anthony Kiedis: Lead vocals
- Josh Klinghoffer: Guitars, backing vocals
- Flea: Bass
- Chad Smith: Drums
- Mauro Refosco: Percussion
- Choir: Silverlake Yotuh Chorale, directed by SJ Hasman.
- Vocalists: SJ Hassman, Karen Whipple, Natalie Taylor, Laura Dickinson, Ann Sheridan, Drew Tablak, Fietcher Sheridan, Matthew Selby, Greg Whipple
- Vocal Arrangement: SJ Hasman