The TacVent is a flexible layer of semi-rigid, rubbery plastic comprised of vented grooves designed to be placed between a concealable ballistic vest and undershirt with a half-inch separation to provide airflow. According to the company, the new TacVent 2.0 is 21% lighter. A lighter and softer material was used for the TacVent, with its venting and ballistic properties unchanged. The TacVent helps to cool body temperatures over 14.5 degrees while also minimizing blunt force trauma.