ESS Advancer V12 goggle ballistic lenses open and close to regulate ventilation and filtration. Two protective Lens Pods, an anti reflective ESS Goggle SpeedSleeve, and a protective V12 Soft Case included. For the first time ever, a goggle can adapt to its environment with a simple click of the lenses, increasing or decreasing airflow. The ESS Advancer V12s 2.8mm polycarbonate high impact lenses are fully interchangeable, providing the ability to quickly adapt to any light condition or replace damaged lenses. All ESS Advancer lenses provide UVA UVB Protection. Ideal for Army desert, police SWAT, or close protection use.