Bolle Attacker Tactical goggle is made with a lightweight, flexible PVC frame, comfortable 8 mm PVC foam and a double poly-carbonate and acetate lens system. The Attacker is Bolle's original tactical goggle and also offers superior dust and ballistic protection for tactical, safety and the outdoor ATV environment. The flexible frame of Bolle Attacker Tactical Goggle X500 uses a double pin retention system to secure the lens and special grooves are built into the sides to accomodate glasses. The face foam of Bolle Attacker Tactical Goggles is made of soft PVC, 8 mm thick, for a good seal and comfort. The Double Lens of Bolle X500 Attacker Tactical Goggles creates a thermal barrier to prevent fogging and provide added protection. The outer lens is 1.44 mm polycarbonate and the inner lens is .7 mm acetate, giving 2.4 mm of total protection.