Here is a description of their style:
Members of Doomtree bring various bases of knowledge and musical backgrounds together to create alternative-influenced rap and hip-hop music. Nearly as prominent as the influence of hip-hop in their music is that of punk and their lyrics and frequently introspective. Emcees perform solo or with one another, each contributing a different approach to their music.
Enjoy the clip above posted to the NPR website. You really get a good picture of what this group is all about.