An acoustic ceiling baffle that includes a baffle body and one or more attachment mechanisms disposed on a top edge of the baffle body configured to couple and decouple from a runner of a ceiling suspension system. The attachment mechanisms include a recessed portion that receives the runner. The recessed portion includes a first section and a second section with an opening disposed between the first section and the second section. The first section is configured to engage with a face of the runner when the acoustic ceiling baffle is coupled to the runner. The attachment mechanism further includes a first retention member and a second retention member formed around the recessed portion, each retention member comprising a bottom edge that is configured to engage with a top surface of a face of the runner.