Bluhalo is a new invention that attaches to the underside of the vest and is inflated to creat airflow and heat dissipation. Pre-sale now get 30% off for the next 26 days. $35 instead of $50. Check it out and/or order here BLUHALO I’m a Police officer looking for your support to help bring this to market, thanks in advance. Thanks guys, stay safe, stay cool!