Pyramex V2-XP Goggles feature a Dual Pane lens that combines optically correct polycarbonate outer lens combined with interior acetate lens to create a Thermo Lens System which traps and isolates high heat or extreme cold in between the lens system and away from the face. The Thermo Lens System provides excellent resistance to fogging caused by the temperature difference between indoor & outdoor or between on-site and ambient environment. TPU frame features excellent resistance to cold and heat and provides a perfect facial seal. Special indirect ventilation system located at the top and bottom of frame allow air flow & heat release. Includes a wide adjustable elastic strap with quick release system for secure fit.