Double lens. 3 mm tempered glass. New Two Button Seeger release system: allows for a quick, safe and easy way to remove and replace the lenses. Natural Skirt Fit: High-grade silicone skirt molds and adjusts naturally to your face for a comfortable, leak-free sea. Push-Button Strap Security: Counterposed push-button activation makes strap adjustments quick and easy, even while wearing gloves Wide silicone strap provides stability and comfort. Weight: 185 g