Polarcool AB is a Sweden-based medical device company specializing in sports medicine. The Company focuses on of concussive and sub-concussive brain injuries. It develops a portable brain cooling device called PolarCap System. The PolarCap System consists of a cooling unit and a silicone-based cooling cap alongside neoprene insulation, cooling the head and neck via a circulating coolant during a procedure that takes approximately 45-60 minutes. The idea behind it is the reduction of brain temperature of individuals suffering from a concussion or participating in an activity where repetitive head impact occurs, such as contact and combat sports, in order to prevent or limit long term cognitive impairment. The device undergoes preclinical cohort study for concussion among hockey players and a preclinical study for indication of sub-concussive repetitive head impact among American football players.