Thirty Seconds To Mars Concert Tank Gradient Blue Color Size XL. Excellent Condition. See pics for measurements Thirty Seconds to Mars (commonly stylized as 30 Seconds to Mars) is an American rock band from Los Angeles, California, formed in 1998. The band consists of brothers Jared Leto (lead vocals, guitar, bass, keyboards) and Shannon Leto (drums, percussion). During the course of its existence, it has undergone various line-up changes with the Leto brothers being the only consistent members.