Experience the revolution in functional military eye protection. Equipped with the patented Adjustable Ventilation System (AVS™) technology, the Advancer V-12™'s ballistic lenses open and close to regulate ventilation and filtration. For the first time ever, a goggle can adapt to its environment with a simple click of the lenses, increasing or decreasing airflow on the move. 2-Lens Version Includes an Advancer V-12™ goggle with Clear & Smoke Gray lenses, a protective Lens Pod™, an anti-reflective SpeedSleeve™ and a protective V-12™ Hard Case. ESS's patented Adjustable Ventilation System (AVS™) Technology is a revolution in functional eye protection. “Advancing” lenses click forward to initiate maximum airflow and eliminate lens fogging, or snap closed to seal out sand, dust, and debris. Patent #6,718,561 B2 The Advancer V-12’s 2.8mm polycarbonate high-impact lenses are fully interchangeable, providing the ability to quickly adapt to any light condition or replace damaged lenses. Replacement lenses are available in Hi-Def Yellow, Clear, Smoke Gray, and Polarized. The patented SideWinder™ Strap Outriggers pivot forward to position the strap for maximum compatibility with helmets and to ensure that the goggle seals comfortably on the face, with or without a helmet. Patent #6,047,410 Prescription lenses can be fit by any optometrist into the ESS Vice™ Rx Insert, a wire-framed lens carrier that snaps into both the Advancer V-12™ goggle frame and the ICE 2.4™ Eyeshield nosepiece. This low-profile, frameless prescription integration accommodates a range of corrections to +/- 6.