On a hot day there's nothing more uncomfortable than having to wear a T-shirt soaked with sweat. Add a bullet-resistant vest over it and no amount of air conditioning coming from your car vent is going to keep you cool and dry. CoolCop offers a solution to this age-old problem. The system attaches to a vehicle's A/C and directs cool, dry air behind an officer's vest where its needed the most. CoolCop adapters are available for nearly every patrol vehicle in service.