Metallica’s James Hetfield and Sammy Hagar have teamed up for their third annual Acoustic-4-A-Cure concert benefitting the Pediatric Cancer Program at UCSF Benioff Children’s Hospital.

Slated for the Fillmore in San Francisco on May 15, the two rock legends will welcome guests Melissa Etheridge, Tommy Lee, John Mayer, Pat Monahan and Joe Satriani. The all-acoustic show will feature special collaborations and one-off performances from the all the performers.

Tickets will go on sale April 1 at 10 AM via LiveNation.