Rather than stick to vague genre tags or invent new hybrids, the members of Sun Bones offer the term "malleability." It's fitting for a classically trained band that somehow manages to fit four-part harmonies, bursts of punk, comforting pop melodies, and avant-garde excursions under a single umbrella and make it all work. The Tucson band — voted as last year's Tucson Weekly Up-and-Coming Artists of the Year, under their former name, Boreas — is touring in support of self-released debut Sentinel Peak, recorded with producer Chuck Dorman at the Saltmine Studio Oasis in Mesa. "We had this collection of songs, and we were aware it was a huge variety," says singer-guitarist Sam Golden. "Not a grab bag, but influenced by very different styles. We ordered it in a way to help guide people to the weirdness. It starts out more conventional. We front-loaded [Sentinel Peak] with the poppy songs, and as the album goes on, we slowly introduce the more eccentric side of the band." Sun Bones shine on both Sentinel Peak and in the band's explosive and frantic live performances, where the foursome works itself into such a frenzied place that it seems possessed by the music. "That's really where our punk aesthetic shines through," says guitarist Evan Casler.