Nixon just launched the second iteration of the Rock LTD collection, a series of limited edition timepieces featuring wristbands crafted from the material of donated leather jackets, pants and guitar straps from some of the world’s biggest musicians and athletes.

And it’s for a damn good cause. Proceeds from each sale go to MusiCares MAP Fund, a charity providing members of the music community access to addiction recovery treatment. Lived in and worn in, your next watch could carry with it a story from Slash, James Hetfield, Kirk Hammett, Eminem, Jared Leto, Chris Martin, Tim McGraw, Brandon Steinekert, Macklemore, Alisa Xayalith, Jun K, Tony Hawk or Nick Rimando. The back of the watches include a custom, etched case with the name of the artist or athlete, and they’re each packaged with certificates of authenticity.

The Rock LTD collection pricing is available upon request and can be purchased globally at Westime, some Fred Segal locations and all Nixon flagships (NYC, London, Paris, Hong Kong and Australia). We wonder if these timepieces dually function as time-travel devices back to the great places these icons have worn the leather, but so far no word.

nixonNixon says: “Legendary lead guitarist, Slash, is one of the founding members of the American rock bands Guns N’ Roses and Velvet Revolver. Known for his black top hat, black leather pants and ear piercing guitar riffs, his constant dedication to his craft has made him a rock n’ roll powerhouse for over the last two decades.”

nixonNixon says: “Considered by most to be the most famous skateboarder of all time, Tony Hawk stepped onto his first board at age nine in his hometown of San Diego and never looked back. Today he runs numerous successful businesses and devotes countless hours to the Tony Hawk Foundation charities and initiatives. He has donated one of his very own leather jackets to make 20 limited-edition watches, each one benefitting MusiCares MAP Fund.”

Nixon says: “James Hetfield is the co-founder, lead vocalist, rhythm guitarist, main songwriter and lyricist for the American heavy metal band Metallica. With a fierce, unbending dedication to his art, and the uncanny ability to empathize with millions, vocalist and guitarist Hetfield is an inspirational focal point for Metallica and is mainly known for his intricate rhythm playing.”